Startup Disc for Mojave?

EmptyAngelo_jak wrote:

Hi,

When I had to download Mac OS Mojave again to fix my MacBook pro from random shut down errors, i was asked which disc I'd like to put Mojave on? Does it matter what disc (Macintosh Data/Macintosh HD)? I chose Macintosh HD? Some backup information -

I had my old Mojave on Macintosh Data, which i did by accident. Could this be why i have the following problem?

As of now, in safe mode my Disc Utilities found a problem to be repaired:

"Problems were found with the partition map which might prevent booting".

When I fix this from recovery mode in DU, this problem no longer shows.

Boot into Recovery (Command R) and from the dropdown menu: Utilities>  Disk Utility> run the First Aid on your Macintosh HD (and the "Macintosh HD-Data" volume as well if Catalina) If errors are found and repaired, run again until no errors reported.

Recovery: https://support.apple.com/en-us/HT204904

No harm in reinstalling the macOS from Recovery on top of your existing macOS.

If in doubt Call (800) MY–APPLE (800–692–7753)

or

https://getsupport.apple.com/

EmptyAngelo_jak wrote:

Unfortunately, upon Disk Utility in safe mode now, after trying to First Aid the SSD, it says

"First Aid found corruption that needs to be repaired. To repair the startup volume, run First Aid from Recovery"

In the Detailed report, it says

"Problems were found with the partition map which might prevent booting"

Can this help solve why my MacBook keeps shutting down?

Thank you for your initial answer by the way! I was so happy to see a response already!

It would seems reinstalling to the Macintosh HD would be the go to way.

If need be and First Aid can not make the repairs— erasing/formatting/reinstalling the macOS a new and restore your User from Backup would be the way forward for a trouble free start.

How to reinstall macOS from macOS Recovery: https://support.apple.com/en-us/HT204904

Disk Utility>View>Show All Devices here you can choose to initialize the "parent" Drive, not the Container or child Volumes.

3-2-1 Backup Strategy: three copies of your data, two different methods, and one offsite.

Boot clone https://discussions.apple.com/docs/DOC-10081

How to use Time Machine to back up or restore your Mac: https://support.apple.com/en-us/HT201250

Use DiskUtility Restore feature https://support.apple.com/guide/disk-utility/restore-a-disk-dskutl14062/mac

note: >System Preferences>Security & Privacy >Privacy>Full Disk Access

unlock the padlock, press the + button and add Disk Utility

You can create a Bootable Mojave USBinstaller—it contains all the tools

How to create a bootable installer for macOS - Apple Support