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Hardware Monitor is an application to read out all available hardware sensors in Mac computers. The program can display and visualize measured values in a large variety of fashions. It can also store and export readings. The application Temperature Monitor is available for free, but is limited to accessing temperature sensors only. The application Hardware Monitor is commercial shareware, but can access additional sensors if your computer is equipped with them. This includes the following sensor types:
  • Battery sensors on portable computers
  • more...

What's New

Version 4.98:
  • Added support for Growl 2 in addition to Growl 1.
  • Several chapters in the reference manual have been revised.


OS X 10.4 or later

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Hardware Monitor User Discussion

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Norz Member IconReview+2

Useful to show fan speed history.

(My Macbook Pro 2007 fans can get very noisy, tracking their rotation speed makes it easier to see what can have an impact. Tracking temperature is of course the first step, but fan speed by itself is also valuable.)

Reply0 replies
Version 4.98
Thresher-The-Shark Member IconComment+144

Att. MacUpdate Admins. 4.9.4 has been released.

Reply2 replies
Version 4.93

Sorry meant 4.94.


Thanks for the heads up! I've update the listing.

Paladino Member IconReview+79

Been using this gem for the past 31/2 years, first on my Powerbook and now on my MacBook Pro Intel core2 Duo. It's always worked perfectly for me with never a hint of trouble. The developer, Marcel Bresink is a real pro; he really knows his craft. I have the utmost respect for him.

This beautifully done little work of art is well worth its very modest cost of, currently, €7 (a little more than $10 US.). I'd say it's a real bargain.

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Version 4.6
pdmarsh Member IconComment+0

I saw that Hardware Monitor had been updated to version 4.5 and decided to try it again. Although version 4.3 clearly didn't like my original aluminum iMac, version 4.5 works perfectly for me now.

I'm now running MacOS X 10.5.2, and my original aluminum 24" iMac 2.8GHz machine has since been replaced by Apple when it was damaged during a repair, so I don't know whether it was a system software update, a hardware update, or the updated Hardware Monitor software, but my Mac's been running 24x7 for a week now with the new version with no issues.

So, I must say this issue is now closed for me.

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Version 4.5
pdmarsh Member IconComment+0

Well, it's been a couple of months since I turned off Hardware Monitor and I've had NO MORE FREEZES, so this closes this issue out for me.

Hardware Monitor is a cool app, but clearly has a problem with my new iMac's 2.8GHz Core 2 Duo processor.

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Version 4.3
pdmarsh Member IconComment+0

I migrated my old G5 Tower apps/accounts/data to my new 24" 2.8GHz iMac in early November, and had periodic freezes (from 5 minutes to 3 days) that I was having trouble resolving. To narrow the field of issues, I built a clean partition with Leopard on the iMac and proceeded to install my old apps and data just to use as a control environment.

I found that this control environment NEVER froze, so I knew I wasn't having a hardware issue, but my migrated account continued to spontaneously freeze periodically. To see what was happening, I turned off the screen saver and energy saver, left the CPU always on, opened the Console log and Activity Monitor window (selected highest CPU usage column), left iTunes running, and waited.

The next time it froze, I looked at the Console log on screen and noted nothing usual was happening when it froze. Activity Monitor showed the iMac was idling at ~6%. Interestingly, I was able to connect ONCE to the iMac from another Mac and play an iTunes song, but multiple selections failed, and then the iMac became unresponsive over the network.

I read on a forum of another user who was having sporadic freezes and thought Hardware Monitor might be involved, but he couldn't confirm it. When I rebooted from my control startup partition, I noted that I hadn't yet installed Hardware Monitor on it, so I thought I'd try turning it off on my migrated startup volume.

That was nearly four days ago, and the iMac has remained fully operational and functional.

I initially tried just turning off the enhanced sensors extension, but that didn't help. My iMac ONLY remained stable with Hardware Monitor turned off.

Since it takes anywhere from 5 minutes to multiple days for the freeze to occur, it's difficult to diagnose, but I intend to reactivate all my usual stuff (except for Hardware Monitor) later today, install the pending Apple updates, reboot, and wait some more. If it freezes again, WITHOUT Hardware Monitor running, I'll be sure to update this post. But, it's never survived more than three days before, and it'll be four days this afternoon.

I should note I've been using Hardware Monitor for years, and it works just fine on all my PPC Macs (all also running Leopard). But it definitely appears to be having an issue with my new iMac.

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Version 4.3
sjj_public Member IconComment+6

I had been using the Lite version and liked it, and so downloaded this "Hardware" version and like what seem to be the additional features, but my one big complaint is that the demonstration version does not let you even try the additional features for a limited time, it only tells you what those features are. I still purchased a copy because I wanted to support just the Lite features, but surely having a trial of the added features in the "Hardware" version would only help matters? One other nit is that the purchase procedure does not give instant gratification. A lot of shareware I buy gives you a registration code instantly, but with Hardware Monitor it appears I have to wait for the author to send me the code which I guess is a manual process. Not a huge deal, but definitely could be better.

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Version 3.95
Juki Member IconReview+3

Superbly done! And it just keeps getting better. I purchased this app about a year ago and refer to it a lot. And at only $10, it's a bargain.
The developer just keeps improving it, offering frequent updates. 5 stars for this beautiful, extremely useful creation, and 5 stars for the developer...a real mensch.
Hardware Monitor rocks!

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Version 3.9
Anonymous Member IconReview

A minor heads up. Not all macintosh computers have sensors. Only mostly the ibook/powerbook line which contain temperature sensors and such. But other computers such like old imacs and others might not include sensors at all so your paying for something you can't even use. Plus there are other applications that do this for free. X Resource Graph for example. Later.

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Version 3.01
Hank2 Member IconComment+9

I gather if "lite" finds nothing, there's nothing -- right?

Ge Pismo, with 900 mhz aftermarket CPU.

Nothing found to report.

Reply2 replies
Version 1.5
Anonymous Member Icon

No it means get a new computer that actually has hardware it can report from.


THAT is FRIGGIN Cruel!!!!!!

There are no Ratings for this App yet.
> 5 3


Current Version (4.x)


Downloads 58,868
Version Downloads 3,688
Type Utilities / System
License Shareware
Date 20 Sep 2013
Platform OS X / PPC 32 / Intel 32
Price $10.00