[Tails-testers] Couldn't boot Tails v3-beta on an old Mac

Hello,

I've been using Tails v2 for only a few months. I thought i would
try to Beta the v3. I created an intermediary USB... but when i
rebooted both an old Mac (2008?) and a modern MacBook Air, it didn't
even get as far as recognizing the internal or EFI (USB) bootable
systems. :(

Hope that helps.

--
eden