August 2, 2018 | Tam Nguyen These are my problem on macbook pro 15", mid 2015: – macOS running very slow – fan running high – kernel_task taking up to 500% CPU And I fixed my macbook as following steps: Step 1: Disable SIP Enter recovery mode – Shutdown your macbook – Press keys: Command + R – Press power button – Release keys Command + R when Apple logo appears – Open Terminal app on recovery screen, then run below command: csrutil disable Shutdown your macbook Step 2: Disable kernal plugin IOPlatformPluginFamily Enter single mode Hold down Command - S immediately after pressing power button when turning the computer back on. Keep holding until a bunch of white text on black background appears. When the white text finishes scrolling enter: fsck -fy mount -uw / Backup IOPlatformPluginFamily.kext rsync -av /System/Library/Extensions/IOPlatformPluginFamily.kext /Users/Shared/ Delete IOPlatformPluginFamily.kext rm -rf /System/Library/Extensions/IOPlatformPluginFamily.kext Restart your macbook shutdown -r now Waiting your macbook restart completed. Your macbook run fast again. Done. 🙂 Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Google+ (Opens in new window) Related