![]() For example, if you want to install Windows 10/11 on other hard drives or other computers and you don’t have an installer disc around, it is time to create (UEFI)bootable USB key using Diskpart or other tools. It can help you to install operating system. You now have a mac bootable USB drive that has a windows partition that is readable and writable by both macs and windows.(UEFI) Bootable USB, just as its name implies, is used to boot non-OS computer or OS corrupted machine.īootable USB drive can help to repair system when your OS fails to boot.īootable USB stick can assist you back up the hard drive without booting Windows when Windows is unbootable due to damaged boot files. I like to do a Disk Utility repair on the HFS+ partition following the restore. ![]() Restore (using Disk Utility) your prebuilt minimal OSX to the HFS+ partition.ĥ. You are now back to having two partitions.Ĥ. Plug the drive into a Mac, fire up Disk Utility, click on the USB drive, select partition tab, select the xxx partition and press the "delete" key. Plug the drive into the windows machine and agree to it formatting the drive (200 MB only for some reason) and label it something odd (I use xxx)ģ. Partition the USB drive with GUID partition table first partition Fat32 (or exFat) and the second HFS+ (8GB minimum to fit OSX)Ģ. Here's the deal.Įquipment: a USB drive of 16 GB larger (try to find one that is fast too), a drive or partition with a minimal OSX build or your liking (10.6.7 for me was 7.2 GB), a running mac, a windows (virtual) machine (I used parallels 5 with Windows 7)ġ. I finally got it done and I don't know why it works, but it does. Two partitions one bootable mac partition and one that can be read and written by both macs and windows machines. I did not test this with a hard drive, with a different bus than USB, or under Windows Vista, but I assume these cases follow the same behavior. I tested this with a USB flash drive under Windows 7 Pro and under XP Pro, and both only recognized the FAT32 volume when it was the first one. If you set the HFS+ partition as the first one, Windows won't be able to see the FAT32 partition and will tell you that the disk has to be formatted. To be able to use it under Windows, you also have to make sure the partitioning scheme is set to Master Boot Record (MBR). ![]() If you ever want to divide a drive into two partitions, one formatted as Mac OS Extended (HFS+) and the other as FAT32, and to be able to access the FAT32 partition from Mac OS X and Windows, just make sure you set the FAT32 partition as the first one on the drive when you partition it with Disk Utility. This may be evident to some people, but I was a little surprised that my first attempt at it failed. ![]()
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January 2023
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