Whenever you upgrade your Mac OSX, you should perform resets of NVRAM (formerly PRAM) and SMC to get the full power of the upgrade and clean out old files and settings that will otherwise slow your Mac down. The guide below is based on using my own Macbook Pro Retina 2014, your computer may vary.

Reset your NVRAM

To reset your NVRAM, you use exactly the same procedure you once used to reset PRAM:

  • Shut down your Mac
  • Press the power button, and as soon as you hear the startup chime, hold down Command-Option-P-R.
  • Keep holding down those keys until you hear a second startup chime.
  • Let go of the keys and allow your Mac to continue starting normally.

You may need to check things like the startup disk, display settings, and date/time panes of System Preferences to make sure they’re set the way you want them.

Reset the SMC

To reset the SMC:

  • Turn off the Mac
  • Make sure the Mac is plugged in to AC power.
  • On the keyboard, press and hold the Shift, Option, and Control keys on the LEFT side of the keyboard, and at the same time press the power button. Your Mac should not turn on, if it does, you will need to do this again.
  • Release all the keys at once
  • Turn the Mac on normally

Other tips for speeding up Safari

A few more tips for speeding up Safari when it runs slow:

  • Reboot the Mac into safe mode by restarting and immediately holding down the “Shift” key
  • From Finder, hit Command+Shift+G and enter the following path: ~/Library/Caches/com.apple.Safari/
  • Delete the cache, restart, load Safari (it will recreate the cache)