![]() ![]() Cannot advance to High Sierra or Catalina due to the same missing firmware partition error. My diskutil list information is as follows: /dev/disk0 (external, physical):Ģ: Apple_HFS Macintosh HD 959.2 GB disk0s2ģ: Apple_Boot Recovery HD 650.0 MB disk0s3 Press and hold the Power button until Loading startup options appears Choose Options > Continue. On a M1 Mac Click the Apple logo and choose Shut Down. Wait until you see the macOS Utilities window. ![]() Hold down Command + R when your Mac is restarting. Before that I got the message that I am missing a firmware partition. On a Mac with an Intel processor Click the Apple logo menu and choose Restart. I got this error after doing diskutil verify disk. I am looking to update to Catalina but I get the error message in the title of this post. I am currently on a Early 2015 Macbook Pro on El Capitan 10.11.6. ![]()
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