USB install Drive Mac not detected

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2010年中 MacBook Pro 13" 一体化机

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YoUr BoI @yourboi

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USB install Drive Mac not detected

I have used my windows computer to install Mac OS High Sierra 10.13.1 on to a USB flash drive to install this os onto a new SSD. I used transmac on windows to install to the USB drive and I checked it on my functioning mac and I could see the installer was successfully installed. But when I insert it into my 2010 mac pro and use the option key after boot up no drives are shown. But in recovery mode drive manager you can see that it is recognized. It does not pop up in the choose startup drive menu. The USB drive is 15gb btw. '''Thank you for any Help!

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Dan @danj

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By default the USB thumb drive’s format is FAT32. You need to first reformat it to GUID with a journaled file system (HFS+) Then use the installer setup script to properly bless the drive.

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Why? A Mac will recognize a Fat32 externally, will even boot from one if a Mac OS is installed, just not internally. I know from experience, (doing it my mistake). I don't remember having to Bless drive since system 9.

由 mayer 完成的 2020年2月2日

@mayer - The installer script does the blessing ;-} What complicates things is doing the setup of the drive on a Windows system using TransMac app. As you can't run the Mac script you need to do things manually so the installer files OS is loadable on the USB drive when they try to boot under it.

I was never able to boot up externally or internally a FAT32 drive, but then again that was quite a while ago (El Capitan days I think) As such I just as a matter of course make sure the volume is GUID/HFS+ or now GUID/APFS.

由 Dan 完成的 2020年2月2日

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Why? A Mac will recognize a Fat32 externally, will even boot from one if a Mac OS is installed, just not internally. I know from experience, (doing it my mistake). I don't remember having to Bless drive since system 9. — mayer
@mayer - The installer script does the blessing ;-} What complicates things is doing the setup of the drive on a Windows system using TransMac app. As you can't run the Mac script you need to do things manually so the installer files OS is loadable on the USB drive when they try to boot under it.

I was never able to boot up externally or internally a FAT32 drive, but then again that was quite a while ago (El Capitan days I think) As such I just as a matter of course make sure the volume is GUID/HFS+ or now GUID/APFS. — Dan

2010年中 MacBook Pro 13" 一体化机

USB install Drive Mac not detected

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