Mac Re-install the OS: Difference between revisions
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=Re-install with Data Deletion= | =Re-install with Data Deletion= | ||
El Capitan: Command + R while restarting. | |||
OS X Utilities -> Disk Utility | |||
First delete the partition from Disk Utilities, then "Reinstall OS X". Reinstalling without explicit deletion will upgrade and preserve the data. | First delete the partition from Disk Utilities, then "Reinstall OS X". Reinstalling without explicit deletion will upgrade and preserve the data. | ||
Local the drive you want to erase (usually it's the only one, and it's named "Macintosh HD". | |||
Erase "Macintosh HD"? | |||
You can preserve the current name, and choose a format: OS X Extended (Case-sensitive, Journaled) -> Erase. | |||
Then go back to OS X Utilities -> Reinstall OS X. | |||
The computer must be connected to the Internet (wire or wireless): Utilities -> Network Utility. | |||
=Re-install without Data Deletion= | =Re-install without Data Deletion= | ||
Revision as of 02:21, 19 November 2017
External
Internal
Re-install with Data Deletion
El Capitan: Command + R while restarting.
OS X Utilities -> Disk Utility
First delete the partition from Disk Utilities, then "Reinstall OS X". Reinstalling without explicit deletion will upgrade and preserve the data.
Local the drive you want to erase (usually it's the only one, and it's named "Macintosh HD".
Erase "Macintosh HD"?
You can preserve the current name, and choose a format: OS X Extended (Case-sensitive, Journaled) -> Erase.
Then go back to OS X Utilities -> Reinstall OS X.
The computer must be connected to the Internet (wire or wireless): Utilities -> Network Utility.