Warning ⚠️ Badware Recommended by Many!

This is my testimony and experience with an App from a developer named Crystalidea, which is a PC based developer, except for this one app named “Macs Fan Control”, and recommend, after a several week experience of spurious very high temperatures exceeding 92°C causing three different iMac’s to shut down automatically and restart, and giving me an Apple notice to send to Apple concerning a Panic Event! Do NOT download and install on your macOS computer, is only my opinion and Experience.

After installing and using Cyrstalidea’s App “Macs Fan Control” for several weeks, I was able to consistently and repeatedly on three different iMac’s (2011 iMac, 2014 iMac, 2020 iMac, all 27 inch), caused all three to overheat receiving Numerous warning numerous warningnumerous warnings notices from iStat Menus of temperatures Exceeding more mor than 92°C for over 10 seconds, causing all three to shut down and restart, as set in system preferences. My normal fan rpm’s on all three devices were in the upper 900’s to 1200’s, yet even in idle mode doing nothing except changing desktop pictures or screensaver pictures the fans were racing audibly in the 2000’s to 3000’s RPM, Temperature to fluctuate from the high 50s to the mid 90°C to the mid 90°Ctemperature to fluctuate from the high 50s to the mid 90°C!. No settings we’re set in The apps configurations for boosting fan speed; but, all set to System control for fans.

For weeks I thought something was seriously wrong and got some feedback that there was an overheating problem with Big Sur in the newer iMac, and I had recently vacuumed the ports for dust on the two older iMac’s. I was convinced that I was lucky to have this app to control the fan speed to keep my computer running cooler! After some discussion here with folks I became suspicious of this app and another named “TG Pro “. I decided to delete everything except iStat Menus, which I paid for and have been using for about a decade with never a problem. I did a Delete of “Macs Fan Control” using App Cleaner.

Notice all other software from this developer is for the PC, except this one App. Being suspicious that not all orphan files were deleted using app cleaner, are use another app that many years and never read a complaint, Find Any File to check for orphan files under the apps name without the spaces, and another search using the option key when clicking start so it will search everywhere, and must type in your iMac password. Over a dozen orphan files all over the place were discovered. Only after deleting these orphan files that suddenly did erratic high temperatures and erratic high RPMs of the fans completely disappeared and now running what they had been running for many years from 900 to 1200 rpm, and temperatures now never exceed the high 30’s to 50°C 50°C. Suddenly everything was back to normal for the past several days now. Coming home from work one day I was alarmed to see that it had re-installed itself somehow on my 2020 iMac, Then orphan files reappeared on the other iMac’s, seeing the Mac’s fan Control icon in the menu bar once again. The only way it could’ve done this is transfer from my one terabyte SanDisk clone copy of my boot drive that was connected to do weekly copies on Sunday early mornings. I once again did another search with Find Any File and orphan files were found on all three computers that are connected via ethernet. This is really a very bad behavior for an App on an external drive using Carbon Copy Cloner to reinstall itself on the boot drive of my 2020 iMac then reinstall it on the other iMac’s that are connected via ethernet.

Crystalidea at I was convinced was safe, and a number of folks recommended to control one’s fans and check sensors and temperatures. I completely disagree.

I place this notice here as a warning to others that might feel confident as I did and download this app from Crystalidea, which is a PC-based developer except for this one particular App, “Macs Fan Control”. I would recommend NOT downloading and installing on your macOS computer.

Best, Seth

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