#REINSTALL MAC OS COMMAND R INSTALL#

The second mode is best used for when selling your device, as it will install the original OS that was present when the computer was first purchased. The first mode will set up the last OS version installed prior to beginning this procedure and won’t cause any data loss-though you should still back up your data. You can either use the Mac Recovery Mode or Mac Internet Recovery Mode. Once you have backed up your data, you’ll be ready to begin the reinstallation process. You can also make a compressed back up using the Mac’s disk utility and it can all be retrieved from any Mac Computer through your Apple ID. You will be able to back up your important documents, photos, etc. You will be able to back up your entire file including games and other large programs. Time Machine (Apple menu > System Preferences > Time Machine). Here are the most common ways to back up your computer.Ī properly formatted Flash Drive is a common means to back up documents, photos, and music files, depending on how big they are.Įxternal Hard Drive can clone your entire database. The process is helpful, but it is not without its flaws so be prepared.

This process does not necessarily run the risk of wiping your data, but it is ALWAYS good practice to back everything up just in case. They may not contract viruses, but they can lose some functionality, and one of the simplest ways to counteract this is to reinstall the Operating System for your Mac device. No matter how good a computer is built, they all come to a point where necessary maintenance must be performed.

Reinstall mac os command r