Below is a table of some commonly found types.
#Install bootchamp to go back to mac os 10.13 update#
To update the MBR partition table, a mapping of the partition types needs to be known. Here, I assume you are using High Sierra (macOS 10.13.2). Note: The next two commands were executed after starting up from macOS Recovery.īelow is the output from the command gpt -r show /dev/disk0. The BOOTCAMP volume is NTFS formatted and the COMMON volume is FAT32 formatted. dev/disk0 (internal, physical):Ģ: Apple_APFS Container disk1 249.5 GB disk0s2ģ: Microsoft Basic Data BOOTCAMP 200.0 GB disk0s3Ĥ: Microsoft Basic Data COMMON 50.0 GB disk0s4 What is a procedure to manually convert the drive back to the hybrid format?īelow is the output from the command diskutil list disk0. My Mac needs the hybrid format in order to BIOS boot the installed Windows operating system. I am not sure when this changed, but this no longer happens under High Sierra (macOS 10.13.2).
Previous versons of OS X and macOS automatically converted pure GPT drives to hybrid GPT/MBR format when the 2nd, 3rd, and/or 4th GPT partitions were formatted "MS DOS (FAT)" by the Disk Utility application or the diskutil command.
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