I’m trying to do a clean install of macOS via USB on my MacBook Pro 2019 13″.
I have setup the boot security so that:
- It has medium security (I also tried no security) on bootable devices
- Allows the Mac to boot from an external drive.
I formatted my USB to Mac OS Extended (Journaled) with GDUI partition map. The USB with the macOS installer successfully shows on the startup manager. When I try and boot from it, however, I get this message:
I click update and I then get this error after seeing an Apple Logo (yes I was connected to internet):
So in conclusion I cannot boot from this USB.
The USB is of type USB-A that’s connected through a USB-C hub, that could be the problem? Maybe a direct connection from a USB-C usb flash drive is better?
Or the wrong formatting on the USB drive.
That’s the only two I suspect. But then again, why isn’t it updating?