If all else fails, try a different name-brand flash drive of at least 8 gigabytes or greater in size.
Ssd copied mac pro 5.1 not working mac os x#
Some users have problems creating a successful bootable USB flash drive because they attempt to follow Apple's instructions on older versions of Mac OS X that require Disk Utility, not the Terminal window "createinstallmedia" command, to create a bootable USB flash drive. If you still can't boot from the USB flash drive, verify that you created the Mac OS installer on the USB flash drive while working in the same (or as close to) current Mac OS as you intend to write to the USB flash drive. If you can't see it, reset the PRAM and try again. On the machine you wish to install on, you can hold down the Option (ALT) key to select the boot drive, select your installer. Eject the drive if you're ready to remove the USB Drive and install.Deselect the check box ignore ownership.Even if you can’t get 6Gbps like modern machines, you’re still much better off with 3Gbps than 1.5Gbps if you have a choice. The bad combination might give you other issues as well. Click the padlock icon to unlock administrator options. Those Macs will not work with their full 3Gbps link speed with a lot of current SSD’s, instead falling back to 1.5Gbps only.In the info window, expand the Sharing & Permissions: section.Mounting the USB flash drive on the desktop, right click and select "Get Info".The "missing step", after ensuring the USB flash drive is formatted correctly, is to ignore ownership
For this reason, you will need to enable it before/after completing the process described by Apple, MacWorld and others using the "createinstallmedia" command in the Terminal window. Complicating matters, the USB flash drive default may disable boot support.
Ssd copied mac pro 5.1 not working how to#
Most of the guides, including Apple's own support doc on how to create a bootable Mac OS installer on USB - as of this date - fail to mention the ownership step.įirst and foremost, the USB flash drive must support ownership functionality. It may be that boot-up from the USB flash drive is "prohibited" because your USB flash drive requires adjustment to the "ownership" settings.
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