When you use Spaces or Exposé there is a sufficient amount of lag. The animations are slow and stutter.
This can be caused by the BeamSync feature being enabled.
To disable BeamSync follow these steps:
- Press cmd + Space to bring up the Spotlight search.
- Type Terminal and press Enter.
- Inside the Terminal window type the following and press Enter:
sudo defaults write /Library/Preferences/com.apple.windowserver Compositor -dict deferredUpdates 0
- You will need to enter your password and press Enter.
- It won’t show any characters when you type.
- If you do not have a password then set one first.