Macos Thermal Monitor

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This is my example USE Method-based performance checklist for the Apple Mac OS X operating system, for identifying common bottlenecks and errors. This draws upon both command line and graphical tools for coverage, focusing where possible on those that are provided with the OS by default, or by Apple (eg, Instruments). Further notes about tools are provided after this table.

  1. Macos Thermal Monitor Software
  2. Macos Thermal Monitor Drivers
  3. Mac Os X Descargar Gratis
  4. Thermal Monitor Software

Mac temperature monitor or Mac CPU temperature monitor is kind of an alert system that notifies you about the Mac overheating, all the in-built available sensors. It also informs you about the utilities to use when the temperature goes beyond green light and might be dangerous for the device as well as yourself. While Activity Monitor does offer a way to view how apps and other processes are impacting the CPU, GPU, energy, disk, memory, and network usage, the built-in task manager is still quite limited and lacks a clear cut feature to show the current temperature of CPU on macOS. But fret not, this is where third-party Mac apps come into effect. If your MacBook, Mac Pro, Mac mini, or iMac gets put under a lot of stress whether it be gaming, video editing, producing renderings, or simply processing a lot of data which is taxing on the CPU then it might be a good idea to monitor your CPU temperature. Introducing Fanny for macOS. Fanny is a free Notification Center Widget and Menu Bar application to monitor your Macs fans. Compact design allowing you to keep an eye on your systems fans and CPU/GPU temperature while not cluttering up your work space.

Some of the metrics are easy to find in various GUIs or from the command line (eg, using Terminal; if you've never used Terminal before, follow my instructions at the top of this post). Many metrics require some math, inference, or quite a bit of digging. This will hopefully get easier in the future, as tools include a USE method wizard or the metrics required to follow this easily.

Physical Resources, Standard

CPUutilizationsystem-wide: iostat 1, 'us' + 'sy'; per-cpu: DTrace [1]; Activity Monitor → CPU Usage or Floating CPU Window; per-process: top -o cpu, '%CPU'; Activity Monitor → Activity Monitor, '%CPU'; per-kernel-thread: DTrace profile stack()
CPUsaturationsystem-wide: uptime, 'load averages' > CPU count; latency, 'SCHEDULER' and 'INTERRUPTS'; per-cpu: dispqlen.d (DTT), non-zero 'value'; runocc.d (DTT), non-zero '%runocc'; per-process: Instruments → Thread States, 'On run queue'; DTrace [2]
CPUerrorsdmesg; /var/log/system.log; Instruments → Counters, for PMC and whatever error counters are supported (eg, thermal throttling)
Memory capacityutilizationsystem-wide: vm_stat 1, main memory free = 'free' + 'inactive', in units of pages; Activity Monitor → Activity Monitor → System Memory, 'Free' for main memory; per-process: top -o rsize, 'RSIZE' is resident main memory size, 'VSIZE' is virtual memory size; ps -alx, 'RSS' is resident set size, 'SZ' is virtual memory size; ps aux similar (legacy format)
Memory capacitysaturationsystem-wide: vm_stat 1, 'pageout'; per-process: anonpgpid.d (DTT), DTrace vminfo:::anonpgin [3] (frequent anonpgin pain); Instruments → Memory Monitor, high rate of 'Page Ins' and 'Page Outs'; sysctl vm.memory_pressure [4]
Memory capacityerrorsSystem Information → Hardware → Memory, 'Status' for physical failures; DTrace failed malloc()s
Network Interfacesutilizationsystem-wide: netstat -i 1, assume one very busy interface and use input/output 'bytes' / known max (note: includes localhost traffic); per-interface: netstat -I interface 1, input/output 'bytes' / known max; Activity Monitor → Activity Monitor → Network, 'Data received/sec' 'Data sent/sec' / known max (note: includes localhost traffic); atMonitor, interface percent
Network Interfacessaturationsystem-wide: netstat -s, for saturation related metrics, eg netstat -s egrep 'retrans overflow full out of space no bufs'; per-interface: DTrace
Network Interfaceserrorssystem-wide: netstat -s grep bad, for various metrics; per-interface: netstat -i, 'Ierrs', 'Oerrs' (eg, late collisions), 'Colls' [5]
Storage device I/Outilizationsystem-wide: iostat 1, 'KB/t' and 'tps' are rough usage stats [6]; DTrace could be used to calculate a percent busy, using io provider probes; atMonitor, 'disk0' is percent busy; per-process: iosnoop (DTT), shows usage; iotop (DTT), has -P for percent I/O
Storage device I/Osaturationsystem-wide: iopending (DTT)
Storage device I/OerrorsDTrace io:::done probe when /args[0]->b_error 0/
Storage capacityutilizationfile systems: df -h; swap: sysctl vm.swapusage, for swap file usage; Activity Monitor → Activity Monitor → System Memory, 'Swap used'
Storage capacitysaturationnot sure this one makes sense - once its full, ENOSPC
Storage capacityerrorsDTrace; /var/log/system.log file system full messages

  • [1] eg: dtrace -x aggsortkey -n 'profile-100 /!(curthread->state & 0x80)/ { @ = lquantize(cpu, 0, 1000, 1); } tick-1s { printa(@); clear(@); }'. Josh Clulow also wrote a simple C program to dig out per-CPU utilization: cpu_usage.c.
  • [2] Until there are sched:::enqueue/dequeue probes, I suspect this could be done using fbt tracing of thread_*(). I haven't tried yet. It might be worth seeing what Instruments uses for its 'On run queue' thread state trace, and DTracing that.
  • [3] eg: dtrace -n 'vminfo:::anonpgin { printf('%Y %s', walltimestamp, execname); }'.
  • [4] the kernel source under bsd/vm/vm_unix.c describes this as 'Memory pressure indicator', although I've yet to see this as non-zero.
  • [5] the netstat(1) man page reads: 'BUGS: The notion of errors is ill-defined.'
  • [6] it would be great if Mac OS X iostat added a -x option to include utilization, saturation, and error columns, like Solaris 'iostat -xnze 1'.
  • atMonitor is a 3rd party tool that provides various statistics; I'm running version 2.7b, although it crashes if you leave the 'Top Window' open for more than 2 seconds.
  • Activity Monitor is a default Apple performance monitoring tool with a graphical interface.
  • Instruments is an Apple performance analysis product with a graphical interface. It is comprehensive, consuming performance data from multiple frameworks, including DTrace. Instruments also includes functionality that was provided by separate previous performance analysis products, like CHUD and Shark, making it a one stop shop. It'd be wonderful if it included latency heat maps as well :-).
  • Temperature Monitor: 3rd party software that can read various temperature probes.
  • PMC Performance Monitor Counters, aka CPU Performance Counters (CPC), Performance Instrumentation Counters (PICs), and more. These are processor hardware counters that are read via programmable registers on each CPU.
  • DTT DTraceToolkit scripts, many of which were ported by the Apple engineers and shipped by default with Mac OS X. ie, you should be able to run these immediately, eg, sudo runocc.d.

Physical Resources, Advanced

GPUutilizationdirectly: DTrace [7]; atMonitor, 'gpu'; indirect: Temperature Monitor; atMonitor, 'gput'
GPUsaturationDTrace [7]; Instruments → OpenGL Driver, 'Client GLWait Time' (maybe)
GPUerrorsDTrace [7]
Storage controllerutilizationiostat 1, compare to known IOPS/tput limits per-card
Storage controllersaturationDTrace and look for kernel queueing
Storage controllererrorsDTrace the driver
Network controllerutilizationsystem-wide: netstat -i 1, assume one busy controller and examine input/output 'bytes' / known max (note: includes localhost traffic)
Network controllersaturationsee network interface saturation
Network controllererrorssee network interface errors
CPU interconnectutilizationfor multi-processor systems, try Instruments → Counters, and relevent PMCs for CPU interconnect port I/O, and measure throughput / max
CPU interconnectsaturationInstruments → Counters, and relevent PMCs for stall cycles
CPU interconnecterrorsInstruments → Counters, and relevent PMCs for whatever is available
Memory interconnectutilizationInstruments → Counters, and relevent PMCs for memory bus throughput / max, or, measure CPI and treat, say, 5+ as high utilization; Shark had 'Processor bandwidth analysis' as a feature, which either was or included memory bus throughput, but I never used it
Memory interconnectsaturationInstruments → Counters, and relevent PMCs for stall cycles
Memory interconnecterrorsInstruments → Counters, and relevent PMCs for whatever is available
I/O interconnectutilizationInstruments → Counters, and relevent PMCs for tput / max if available; inference via known tput from iostat/...
I/O interconnectsaturationInstruments → Counters, and relevent PMCs for stall cycles
I/O interconnecterrorsInstruments → Counters, and relevent PMCs for whatever is available
  • [7] I haven't found a shipped tool to provide GPU statistics easily. I'd like a gpustat that behaved like mpstat, with at least the columns: utilization, saturation, errors. Until there is such a tool, you could trace GPU activity (at least the scheduling of activity) using DTrace on the graphics drivers. It won't be easy. I imagine Instruments will at some point add a GPU instrument set (other than the OpenGL instruments), otherwise, 3rd party tools can be used, like atMonitor.
  • CPI Cycles Per Instruction (others use IPC Instructions Per Cycle).
  • I/O interconnect: this includes the CPU to I/O controller busses, the I/O controller(s), and device busses (eg, PCIe).
  • Using PMCs is typically a lot of work. This involves researching the processor manuals to see what counters are available and what they mean, and then collecting and interpreting them. I've used them on other OSes, but haven't used them all under Instruments → Counters, so I don't know if there's a hitch with anything there. Good luck.

Software Resources

Kernel mutexutilizationDTrace and lockstat provider for held times
Kernel mutexsaturationDTrace and lockstat provider for contention times [8]
Kernel mutexerrorsDTrace and fbt provider for return probes and error status
User mutexutilizationplockstat -H (held time); DTrace plockstat provider
User mutexsaturationplockstat -C (contention); DTrace plockstat provider
User mutexerrorsDTrace plockstat and pid providers, for EDEADLK, EINVAL, ... see pthread_mutex_lock(3C)
Process capacityutilizationcurrent/max using: ps -e wc -l / sysctl kern.maxproc; top, 'Processes:' also shows current
Process capacitysaturationnot sure this makes sense
Process capacityerrors'can't fork()' messages
File descriptorsutilizationsystem-wide: sysctl kern.num_files / sysctl kern.maxfiles; per-process: can figure out using lsof and ulimit -n
File descriptorssaturationI don't think this one makes sense, as if it can't allocate or expand the array, it errors; see fdalloc()
File descriptorserrorsdtruss or custom DTrace to look for errno EMFILE on syscalls returning fds (eg, open(), accept(), ...)
  • [8] eg, showing adaptive lock block time totals (in nanoseconds) by calling function name: dtrace -n 'lockstat:::adaptive-block { @[caller] = sum(arg1); } END { printa('%40a%@16d nsn', @); }'

Other Tools

I didn't include fs_usage, sc_usage, sample, spindump, heap, vmmap, malloc_history, leaks, and other useful Mac OS X performance tools, as here I'm beginning with questions (the methodology) and only including tools that answer them. This is instead of the other way around: listing all the tools and trying to find a use for them. Those other tools are useful for other methodologies, which can be used after this one.

What's Next

See the USE Method for the follow-up methodologies after identifying a possible bottleneck. If you complete this checklist but still have a performance issue, move onto other methodologies: drill-down analysis and latency analysis.

For more performance analysis, also see my earlier post on Top 10 DTrace Scripts for Mac OS X.



Resources used:

  • Instruments User Guide and Instruments User Reference
  • Apple's Performance Tools summary
  • xnu source code (kernel)
  • Mac OS X Internals, by Amit Singh, and his online list of performance tools

Filling this this checklist has required a lot of research, testing and experimentation. Please reference back to this post if it helps you develop related material.

It's quite possible I've missed something or included the wrong metric somewhere (sorry); I'll update the post to fix these up as they are understood, and note at the top the update date.

Also see my USE method performance checklists for Solaris, SmartOS, Linux, and FreeBSD.

We all are surrounded by machines and use them on a daily basis, sometimes even unknowingly. But we know that after a period of time, users might face issues such as overheating, and other performance issues, which could be a sign to do something but to optimize your device. Not that you put cool water on it but find ways to cool the device that you are using. But before you wish to cool down your device, learn about Mac temperature monitors which gives an insight about the happenings of your Mac in detail.

Johann Wolfgang von Goethe once said, “Prevention is better than cure.”

So, let’s first understand what a Mac Temperature Monitor is and what it does to your Mac.

Tip:-To keep the temperature at an optimum level, we can also use Mac Cleaner software that has been a helpful big time. Here you can find the Best Mac Cleaners

What is a Mac Temperature Monitor?

Mac temperature monitor or Mac CPU temperature monitor is kind of an alert system that notifies you about the Mac overheating, all the in-built available sensors. It also informs you about the utilities to use when the temperature goes beyond green light and might be dangerous for the device as well as yourself.

Image source:

A macOS application that’s been designed to draw Mac’s temperature in the text- and icon-based form on the menu bar, is Mac Temperature Monitor.

It closely watches the Mac temperature and analyzes if the temperature of the device isn’t exceeding the pre-decided benchmark. It also gives you options to use the appropriate tools to lower the temperature if it isn’t.


Since we have established the need for mac temperature monitor, let’s go through researched and best-picked-up-one’s for you as below:

10 Best Mac CPU Temperature Monitor Apps in 2021

1. TG Pro

Another best in the list of Mac CPU temperature monitors that literally serves the purpose of extending the life of your Mac in the most accurate way. Like the above temperature monitors, TG Pro also watches closely and monitors the sensor temperatures. And in case any of them are heating more than they are supposed to, it boosts the fan speed and tries to keep the Mac cool.

TG Pro performs hardware diagnostics and checks the battery health to take appropriate actions that come in favor of using Mac to an optimum level.

When it comes to compatibility, TG Pro supports all Macs from 2008 and newer along with other multiple models of MacBook Pro.

Macos Thermal Monitor Software

Click here, install, and make the most of your Mac.

2. Temp Monitor

A self-explanatory tool where Temp stands for “Temperature,” not “temporary.” Temp Monitor is one of the best and promising tools that monitors your Mac’s temperature like a pro.

A tool that monitors the processes and apps running on your Mac and even shows you all the available sensors on the device.

It does alert you whenever any of the sensors overheat or goes above the green light. The best part is that this mac temperature monitor has a fan control feature that cools down your Mac in these situations.

A combination of all the amazing features you can expect from a Mac CPU temperature monitor comes with this power-packed bundle. The temp monitor also supports multiple languages as the language shouldn’t be a barrier to use a tool that literally increases your Mac’s life. Isn’t it great?

Download From Here

Also Read:5 Best Mac Optimizer Tool

3. iStat Menus

iStat Menus is apparently one of the most trusted and used Mac temperature monitors with continuous improvements and latest updates. Clearly, this is the most advanced tool that comes with lots of great features to make the user’s experience more delightful.

It categorizes the notifications into CPU, network, disk, battery, weather, and others that show the system’s performance and the affecting factors.

To successfully run the iStat Menus on your Mac, you will require macOS 10.11 and above. This MacBook Pro temperature monitor also provides you with additional features like weather conditions, wind speed, wind direction and more. Isn’t that different and great?

You can gather the credibility of this tool via below appreciations:

“I love the weather forecast notification in iStat Menus 6.” – Bryan Chaffin, The Mac Observer

there’s a new version and it’s better, more detailed and more comprehensive than ever.” – Peter Cohen, iMore

“We truly lost count trying to figure out how many different statistics it reports on but this mass of data is displayed remarkably clearly.” – William Gallagher, Apple Insider

Go ahead and download this amazing Mac CPU temperature monitor here.

4. MenuMeters

Image source: macupdate.comA free yet effective Mac temperature monitor, MenuMeters comes with a few limitations. It works on any macOS 10.11 and above. It’s an open-source and free platform that includes the CPU, memory, disk, and network monitoring tools.

With the last update in mid-2015, the tool needs to run outside of the system preferences. MenuMeters provides a proper balance of cleanly-presented info and configuration that you don’t get to experience in most of the top-class tools.

To learn more about MenuMeters and download the same, please refer to the below links:

Get This From Here

Must Read: Best App Uninstaller For Mac to Remove Unwanted Apps

5. XRG (X Resource Graph)

An open-source system monitor that comes with the goal of being the successful functional system monitor for Mac. The tool is planning to achieve this goal by monitoring the running apps and processes on the Mac and keep them to optimum use. Like other temperature monitoring tools, XRG will monitor the CPU activity, machine performance, memory usage, battery status, etc.

Macos thermal monitor driver

As Lawrence I. Charters (Director of Web Operations at The Washington Apple Pi Journal Online) stated, “When things get busy…this little application is far more colorful. And far more useful: your coworkers, relatives, loved ones, and complete strangers will be impressed. It doesn’t make a bit of difference what your Mac is doing: the graphs show that it is working hard and, presumably, so are you.”

To know more about his reviews on XRG, please visit the page.

You can download XRG with the latest version here.

6. Monity

If you are still thinking about how to monitor MacBook Pro temperatures then Monity is another option in the line. Get Monity and you will be able to understand the memory usage, network and disk usage along with battery status in one single glance. We certainly hope that such an easy viewing of Mac temperature would attract your attention.

Interestingly, it is a very lightweight application that keeps your menu organized and doesn’t play with it messily. An advanced widget and one of the best Mac temperature monitors in the market.

Macos thermal monitor driver

Download Monity.

7. Fanny

How to check Mac temperature? Get Fanny in your computer system! It comes in the form of a free notification widget and has the most compact design when compared to its competitors. This Mac temperature monitor gives you an insight of system fans and CPU/GPU temperature without cluttering the work space. You would surely like this feature of Fanny.

Apart from the above mentioned feature, one can find information on current speed, target speed, number of fans and more using this MacBook air temperature monitor.

Download Fanny from here.

8. coconutBattery

Let your Mac take a quick battery health checkup with coconutBattery! You may not exactly want to call it a temperature monitor but it helps in providing live information about your Mac. But you can definitely save the battery of your Mac by eyeing the measurable changes in a Mac’s lifetime. It is a freeware but you can look for its higher version with a simple online purchase.

Get coconutBattery for your Mac here.

9. iStatistica

Another Mac temperature monitor app is iStatistica which is a system monitoring widget and gives you a summary of Mac with battery information, network activity, temperature sensors and fans monitor. Thankfully, the information is available in languages such as English, French, German, Spanish, Italian and Russian.

With that, get the details of CPU, RAM usage and network stats like external, gateway and local IPs, speed rate and more. This free plugin of Mac temperature monitor is a good combination of features.

Macos Thermal Monitor Drivers

Download iStatistica by clicking here.

10. SMART Utility

SMART abbreviated for Self Monitoring Analysis, and Reporting Technology is an essential tool if you want to keep track of Mac temperature efficiently. The tool not only informs you about the temperature but also any kind of hardware glitches or electrical problems associated with the system. CAUTION: If it tells you to replace the hard disk, make sure that you take the data backup and then do the same.

With that, it supports scanning in the background, displays information in the menu bar, printing driver reports, and keeps running hardware checks timely. Why would you want to miss such a huge bundle of utility tools and Mac temperature monitor.

Download SMART Utility here.

Additional Questions:

Is Mac’s in-built Activity Monitor good enough for Mac Temperature?

Mac’s in-built activity monitor is quite good enough to let you know the device’s performance on the basis of the processes currently running on your Mac. It’s a tool that helps you manage the tasks running on Mac so that you can take proper steps to make optimum use of the device capacity and keep it running.

This activity monitor is kind of a task manager that helps you look through the running apps/processes in a list form as above. It also shows how those apps/processes affect the CPU, energy, memory, or network usage now the question is if the in-built activity monitor isn’t good enough to watch Mac’s performance. And the answer is, sometimes “yes”, sometimes “no”.

First of all, it all depends on the user as to how often he/she uses this in-build feature that gives you the best results in five categories. Second, if he/she is using the tool quite often and still the device has performance issues, the tool hasn’t been updated with the latest version.


For example, in your PC/laptop, you already have Windows Defender; however, you try and install different antivirus software to keep the system clean. It’s as simple as that.

Why do we need a Mac Temperature Monitor/Mac CPU Temperature Monitor?

We all spend a good amount of money to get a Mac and get the best of the best features to use it for a long time. But what if you start facing issues on Mac just after buying or in the warranty period. You can get things fixed till the time it’s in warranty but what after that.

In that case, we need these tools or a Mac CPU Temperature monitor that watches the Mac’s running processes closely and gives you chart-like data. This outcome shows if the system is running smoothly or it’s getting heated due to heavy usage.

This self-explanatory term helps you big time to check the patterns of your device before using it to the optimum level.

So yeah, we need a Mac Temperature Monitor just like you need a Smart Band or Smartwatch to check if your body is functioning properly.

Read Here:Best Anti-Malware Software For Mac

Wrapping Up

Since we all know that our Mac requires the best treatment in case it goes down. But my concern is, why go to the stage where we need to look for treatment? That is why we need to keep the required and necessary tools in the system already to keep the Mac cool and running flawlessly.

Mac Os X Descargar Gratis

To make the most use of your Mac, we have enlisted above the top used, promising, and advanced Mac CPU temperature monitors. These tools are going to monitor every aspect of your Mac and give you the result. You can then check which factor is affecting your system’s performance.

Do give them a try and let us know if any of these worked out best for you. If you are using some other temp monitor without any hassle, don’t forget to share it with us in the comments below.

Thermal Monitor Software

FAQs: Mac Temperature Monitors

1. How do I know if my Mac is overheating?

If you Mac has fans, it usually runs to cool itself down. However, when it heats so much that you are uncomfortable to work on it, it is probably overheating. In case, you are warned with ‘High Disk Temperature’ warning on the screen, it is sure that Mac is overheating.

2. How can I check the temp of my CPU?

There are some good Mac temperature apps like TG Pro, iStats Menus, Fanny, etc. that indicate the present temperature of the Mac clearly.

3. How do I monitor my fan speed on a Mac?

Choose any app like Mac Fan Control to check the fan speed. Now open it, go to Preferences button and find the speed of individual fans.

4. What temperature should my MacBook Pro CPU run at?

The normal temperature for Mac is considered to be 22-25 degree celsius. However, 10 to 12 degree celsius temperature above is still alright. Overall, it could be around 55-60 degrees for a long live of Mac.

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