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<blockquote data-quote="bobtomay" data-source="post: 1654132" data-attributes="member: 24160">If the USB flash drive had Mountain Lion installed on it properly to make it bootable, it should show up as a bootable device while booting up the machine and holding down the option key.However, Mountain Lion OS X 10.8 is not going to install on a '07 MacBook.&nbsp; The latest version of OS X it can run would be Lion, OS X 10.7.It could be that a 10.8 or later version cannot boot an older Mac, I just have not tried it.&nbsp; Guess I should.You can get Snow Leopard direct from Apple for $20. Think you can still get Lion from them also.(The internal drive and it's format, or even if it is a dead drive or has no internal drive, has no bearing on whether a bootable USB installer of OS X will work.&nbsp; All those options I have done on multiple Macs.&nbsp; You would need to partition / format the drive using Disk Utility prior to installing OS X.)</blockquote>

[QUOTE="bobtomay, post: 1654132, member: 24160"] If the USB flash drive had Mountain Lion installed on it properly to make it bootable, it should show up as a bootable device while booting up the machine and holding down the option key. However, Mountain Lion OS X 10.8 is not going to install on a '07 MacBook. The latest version of OS X it can run would be Lion, OS X 10.7. It could be that a 10.8 or later version cannot boot an older Mac, I just have not tried it. Guess I should. You can get Snow Leopard direct from Apple for $20. Think you can still get Lion from them also. (The internal drive and it's format, or even if it is a dead drive or has no internal drive, has no bearing on whether a bootable USB installer of OS X will work. All those options I have done on multiple Macs. You would need to partition / format the drive using Disk Utility prior to installing OS X.) [/QUOTE]

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