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      Hello folks! As some things are being fixed, we'll keep you updated. Per hour the Forum Rules don't have a dedicated "Tab", so here is the place that we have our Rules back. New Users Lounge > [READ] - InsanelyMac Forum Rules - The InsanelyMac Staff Team. 
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josh256

Solution: Macbook will not boot from USB

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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.

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