I use a mobile SSD installing Windows To Go as my mobile workspace. EFI boot works fine on many computers.
Booting it on my Macbook also works fine until the installation of mac OS Mojave 10.14 Developer Beta2.
After that installation, I can still see "EFI Disk" while holding Option key during boot. But after select that, it just keep booting into macOS.
I tried rebuilding EFI firmware, reinstall WTG but not working either.
Select boot disk manually in Settings shows an error message "Bless tool cannot set the boot drive".
I search for that issue and I found this discussion:https://www.zhihu.com/question/282032748 (In Chinese)
Someone says that their Bootcamp Windows and Time Machine Disk cannot boot either in the Option menu.
Someone even says that after wiping their Mac and reinstall OS X 10.12, WTG still not bootable. If that's true, I think maybe Apple changed their SMC's firmware to prevent(?) third-party EFI systems from booting.
I relied on WTG to get rid of Office for Mac's low performance while handling huge files. This issue is really annoying.
I have the same concern as the question's holder on Zhihu: "I don't konw if it's a BUG or a Feature."
I'm guessing if it's a new "feature". Now Beta 3 have released but problem is not fixed.
