There are many reasons to reinstall macOS. It can fix any one of several OS errors. Plus, it helps secure your Mac for sale if you need to wipe all of your data. There are a few different ways to do ...
Recently my daughter purchased an early 2011 13" MacBook Pro. The seller reinstalled Snow Leopard with updates, and then upgraded it to Lion. Unfortuantely, some of his user info keeps popping up in ...