I've recently uninstalled Fan Control, and one of the steps of the uninstallation is that I need to reset the SMC.

So I've done that according to the instructions from the Apple website, however how can I be sure that it has been reset successfully? In particular, I wouldn't want the laptop to overheat because of incorrectly setup fans.

Is there any way to check all this (i.e. if the SMC and the fans are working as expected)?


Actually, as per my experience if you are going to do the SMC reset and your not fully charged battery Macintosh machine is charging, the charging indicator will be the reset indicator as below.

When battery is not fully charged:

  1. Charging indicator is orange light when machine powered off.

  2. Keep pressing Shift + Option + Control + Power for 10 seconds and indicator is still orange.

  3. Indicator turns to green when release all keystrokes and keeps almost 1 second.

  4. Light turns to orange then.


There is no confirm message with SMC reset, however, if you go through post checks on the processes it controls you can get an indication of whether it has worked or not (more here). In your case (fans), run the MacBook in the finder (no overt applications running like Firefox) and listen to the fans - if they are running high then SMC reset was likely unsuccessful.

Note: there are different procedures for SMC reset on different Macs including MacBooks with or without a user changeable battery, so double check Apple support online for the right model (rather than a generic 'how to reset' post).

I run a couple of MacBooks including a Pro Quad i7 2012 17" with the 1 GB graphics card. I can have Photoshop, Indesign and Illustrator open at once without high fans - although it slows to a crawl and fans rage if I run more than 3 or 4 Firefox windows and launch another browser (for website checking) which is a pain. Flash / Ad blockers help control this but its also worth looking at what is running in the background with Activity Monitor. For example, I installed a programme to force clean Ram memory which will fracture over a few hours of work... ironically when it decides to clean, the programme hogs 95% of the processor and the Mac goes into overdrive for 3 or 4 minutes, so I deleted it.

Generally you have to work more efficiently on a Mac Notebook and high fans / spinning ball are more common than on an iMac or MacPro. Clean the OS, run Onyx regularly (GUI management for the unix maintenance and cleaning scripts on your Mac) and consider Chrome (or other light) web browser. Also look out for anything running Akamai in the background and Updaters such as Adobe Application Manager - they tend to launch at startup and sit there all day talking to your web connection 'just in case' there is an update. Take control with an IP manager like Little Snitch and make these updates manually once a week.


Here are the steps:

  1. Turn Airport off ( or disconnect Ethernet or any internet connection )
  2. Reset SMC
  3. Turn on computer

if you succesfully reseted SMC then system date and time will be wrong.

  1. Connect to internet again to automatically set date and time..

hope it helped.


You could try installing apps like Fan Control or SMCFanControl, but generally, as you'd expect, you'll know if your fans are not working properly if your machine is getting overheated.

  • Point of clarification - SMC Fan Control is useful to keep the Mac cooler 'beyond' the system fan settings, not simply as a monitor. For example, in a tower, if you add server ram or two graphics cards the fans will be up and down with performance, however, if you set them 25% higher through SMC the temp will remain stable. This also helps shutdown (MacPro wont shutdown if too hot - it will cool first). Stock MacBook I wouldn't install SMC because fan performance should be OK out the box. Fans running excessively are generally due to processor hogs like Adobe Updater and Flash - remove them. – Applefanboy Oct 12 '16 at 8:44

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