high sierrapartitionrecoveryrepair
macOS High Sierra (10.13) is the main OS on my Mac and it boots without issue. However, the recovery partition is corrupted and I cannot boot to it without seeing an error. How do I reinstall the recovery partition without having to disrupt my working main OS?
The machine I'm using was upgraded from Mavericks.
Meta Note: While there are similar questions for previous MacOS versions, I think unique issues relating to the new APFS in High Sierra justify a new question.
Try System Preferences -> Startup Disk -> macOS. I updated Sierra on my MBP (late 2016) and was unable to boot into Boot Camp. Fixed over the phone with Apple, but then I was unable to boot into macOS. They fixed that at the Apple store today using the above commands.
If you want to boot into Windows directly, just hold down the "option" key while you press power on button. This saves you from having to log in to macOS and then restarting while holding down the option key.
I thought I had the same issue but it's probably because in the view options at the top left corner of the Disk Utility window, "Show Only Volumes" is selected.
In order to change the partition map, it seems you have to select the actual disk. So simply select view - show all devices, then select the actual drive you're trying to reformat, then when trying to erase, you should have the option to choose a partition scheme.
Hope this helps!
Best Answer
Before doing anything related to partitions on your main Mac, it’s best to perform a Time Machine backup.
After doing that, run the latest macOS High Sierra installer from the App Store. This should update macOS and restore the Recovery partition.