josh256 Posted July 6, 2011 Share Posted July 6, 2011 Certain Macs seem to be fussier than others when it comes to booting from USB. A solution I've found that works on all Intel Macs as well as the [few] G4s I've encountered is as follows - assuming you have a *valid* USB boot volume that doesn't work on specific/problematic macs but does on others: - connect the USB drive - power the mac on and hold option key - a boot menu will appear without the USB drive listed as a bootable volume - disconnect/reconnect the USB drive, whenever possible to a different USB port - the USB drive should be re-detected and the new boot volume should appear as an option (if it doesn't appear there's a very good chance the volume isn't partitioned/blessed correctly) - select the new boot volume and hit enter Found it very frustrating that my OSX recover/install thumb drive worked 100% of the time on both my Mac Pro and Macbook Pro and 0% of the time on my wife's macbook and friend's iMac G4. This worked in both cases. Link to comment Share on other sites More sharing options...
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