A few Mac users are reporting that after upgrading MacOS caused their MacBook to run hotter, making unusual fan noise and get freezes. It can cause data loss. When a Mac gets older and that contains full of files, images, videos and apps that may slow down the process and cause to overheating issues. Here are some of the fixes to solve the issues.
FIX 1: Reset the SMC
IF you have a removable battery, then follow the steps:
- Disconnect your Mac Power Adapter if it is connected.
- Shutdown the Mac using the Apple menu -> Shutdown.
- Remove your battery
- Wait for few minutes and Reinstall the Battery.
- Now, Turn on the Mac using the Power button.
IF you have Non-Removable Battery, then follow the steps:
- Power Off the Mac using Apple Menu-> Shut Down.
- Press and Hold the shift + control + option keys as well as your power button all at the same time.
- Wait for 10 Seconds and Release the Keys and buttons Simultaneously.
- Now, Power On the Mac using the Power button.
FIX 2: Resetting the NVRAM
- Open Mac Menu -> Shut Down.
- Wait for Few Seconds, Turn On the Mac, Immediately Press and hold Command + Option (Alt) + P + R, these four keys to Reset the NVRAM ( Non- Volatile Random Access Memory) for a few seconds.
- Release the keys and Restart the Mac.
- Now, the MacBook will restart normally with the complete installation of the Software.
FIX 3: Start up the Mac in Safe Mode
- Turn off your Mac.
- Start your Mac and immediately press and hold the Shift key.
- Now, You may see the Apple logo appears on the screen.
- Then, Release the Shift key.
- Restart your MacBook normally without pressing any keys.
FIX 4: Check CPU activity
- Select Finder -> Go -> Applications.
- Now, Choose and Double-Click on Utilities -> Activity Monitor.
- Then, Click on View -> All Processes.
- Tap on “CPU” Option.
- Check how much CPU is used by each app and whether apps are using the CPU within its limit or not.
- If the CPU is processing with any issues then it will be highlighted in blue.
- Click on “X” button on the top left corner to Quit the process.
FIX 5: Fix Disk errors in Recovery Mode
- Turn Off your Mac.
- Press the Power button and immediately Press and Hold the Command + R keys and Power button simultaneously until the Apple Logo appears on the screen.
- The MacOs Utilities Window will appear with 4 Options.
- Select “Disk Utility”.
- Choose the disk/drive that you want to Repair.
- Select “First Aid-> Run”, this action will check the disk errors.
- Click “Done” and Close the “Disk Utility”.
- Open Apple Menu-> Restart.
Hope the above solutions may help to troubleshoot for the Mac from overheating, Fan makes unusual noise and freezes issues.