How do I sign out of iTunes, iCloud or the App Store on a Mac?

For iTunes:

Follow these instructions from Apple to log out of iTunes.

For iCloud

1. Click on the Apple menu (top left of the screen).
2. Select System Preferences.
3. Click the iCloud panel and then Click on Sign Out.

For App Store

1. Locate your Applications folder.
2. Open the App Store.
3. Locate the Store menu at the top of the screen. Click on sign out.
   OR
   • Click on the "Featured" tab.
   • Click on account.
   • You will see an option to sign out; click on it.