A sure-fire way to prevent your Mac from slowing down and avoid errors like "Your startup disk is almost full" is to regularly free up storage space. There are several things you can do to achieve ...
You can uninstall apps from your Mac by moving them to the Trash or deleting them through the Launchpad.
To delete a user on your Mac, you'll need to do it from the System Preferences menu on your administrator account.
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