Sometimes your Mac might give you problems when trying to boot in Recovery Mode. Your recovery partition could be corrupt or the startup volume has been erased. If you encounter this problem, try this: 1. Restart your computer. 2. Go to “Applications” and then “Utilities.” 3. Locate and launch the “Terminal” app. 4. Type “diskutil list”. Hit the enter key. 5. You’ll see a list of all of your Mac’s drives and partitions. If you don’t see either “Apple_Boot Recovery HD” or “APFS Volume Recovery,” then you’re Mac doesn’t have the proper recovery partition. You may be able to restore this by following the steps below: 1. Restart your computer while holding down the “Command + Option + P + R” keys. 2. Release them after hearing the second chime. 3. Your Mac will automatically reboot. 4. Navigate to “Applications” and then to “Utilities.” 5. Type in “diskutil list” and hit Enter. 6. Check to see if you now have either “APFS Volume Recovery” or “Apple_Boot Recovery HD.” If you now have them, you should be able to boot your Mac in Recovery Mode.