Some USB sticks can't boot my AutoCasperImage

New Contributor II

Hi guys

Happy user of AutoCasperNBI

I'm mostly booting via USB stick and have noticed that some of them can't boot.

I have one KingstonDataTraveler G3 16GB for example that work great. I also have a Kingston 32GB that work just fine.

I've noticed before that I had boot problems with some other DataTraveller sticks but ignored it at the time. Then I bought a DataTraveller 100, 64GB - and I can't boot from that either.

I tried format it as one 64GB size, but also to split it up into 4 equal size parts and put my AutoCasperImage on one of them - no luck.

It's visible as boot device and start booting, but its slow and when I boot verbose I see that it gives me an endless:

"AppleKeyStore: operation failed"

And basically it never boot to desktop. Anyone experienced the same?

PS If I use the same problematic USB stick and just create a standard Sierra Installer - it boot just fine...


Honored Contributor III
Honored Contributor III

@haggan Just somethings to double-check:
- make sure that the USB's have a Partition Scheme of GUID Partition Map
- make sure that the USB's have a format of Mac OS Extended (journaled)
- make sure that you are restoring the restorable.dmg

New Contributor II

Hi Ben

Yes, I can confirm its GUID and Extended journaled.

This is peculiar. Any other tips?