Mac Re-install the OS: Difference between revisions
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OS X Utilities -> Disk Utility | OS X Utilities -> Disk Utility | ||
{{Warn|Reinstalling without explicit deletion of the partition will upgrade and preserve the data}} | {{Warn|Reinstalling without explicit deletion of the partition will upgrade and preserve the data.}} | ||
First delete the partition from Disk Utilities: macOS Utilities -> Disk Utility -> Select Internal -> <''Partition Name''> from the left tab. Usually the partition is named "Macintosh HD" -> Erase -> Specify the new name and the format: APFS (Case-sensitive) -> Erase. The process should end with a message similar to "Erasing "<''Old Partition Name''> and creating "<''New Partition Name>''" -> Done. | First delete the partition from Disk Utilities: macOS Utilities -> Disk Utility -> Select Internal -> <''Partition Name''> from the left tab. Usually the partition is named "Macintosh HD" -> Erase -> Specify the new name and the format: APFS (Case-sensitive) -> Erase. The process should end with a message similar to "Erasing "<''Old Partition Name''> and creating "<''New Partition Name>''" -> Done. | ||
Revision as of 22:24, 13 October 2018
External
Internal
Re-install with Data Deletion
El Capitan: Command + R while restarting.
Other: Command + Option + R while restarting.
OS X Utilities -> Disk Utility
Reinstalling without explicit deletion of the partition will upgrade and preserve the data.
First delete the partition from Disk Utilities: macOS Utilities -> Disk Utility -> Select Internal -> <Partition Name> from the left tab. Usually the partition is named "Macintosh HD" -> Erase -> Specify the new name and the format: APFS (Case-sensitive) -> Erase. The process should end with a message similar to "Erasing "<Old Partition Name> and creating "<New Partition Name>" -> Done.
Then go back to macOS Utilities -> "Reinstall OS X".
Select the drive -> Install.
Adding a new volume to the container
Apple File System (APFS) is preferable, as it's the newest and optimized for SSDs.
Select the container disk or "APPLE SSD ... MEDIA".
Add a new volume with the + icon.
Name
APFS Case Sensitive
Installation
Then go back to OS X Utilities -> Reinstall OS X.
If I get "The recovery server could not be contacted", it is probably because the time is out of sync, so go to Utilities -> Terminal and
ntpdate -u time.apple.com
The computer must be connected to the Internet (wire or wireless): Utilities -> Network Utility.