drawmdf.blogg.se - Osx high sierra bootable usb

Then make a disk image of the USB drive, then convert the disk image to an ISO format. Then on this other Mac run the macOS installer or boot from a USB installer.Ī third suggestion is to first make a USB boot drive - yes I am aware of the above issue. Then connect it as an 'external' drive to another Mac. One can presume that it may be the case that the Mac Pro has been fitted with an upgraded video card which does not have Mac firmware and hence does not support these pre-boot features.Ī suggest for akadmon is to if possible fit the original video card which would have Mac compatible firmware and should support these pre-boot features.Ī second suggestion would be to boot the Mac Pro in to Target Disk Mode by holding down T on the keyboard. Hence it is not possible to use a standard USB boot drive.

The post is saying Option for accessing the Boot Selection screen and Command-R for Internet recovery are not working. You can now quit Terminal and eject the volume.Some people seem to have missed a vital point from the original post.

When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Monterey.

After the volume is erased, you may see an alert that Terminal would like to access files on a removable volume.

Terminal shows the progress as the volume is erased.

When prompted, type Y to confirm that you want to erase the volume, then press Return.

Terminal doesn't show any characters as you type.

When prompted, type your administrator password.

If the volume has a different name, replace MyVolume in the command with the name of your volume.

Each command assumes that the installer is in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using.

Type or paste one of the commands below into Terminal, then press Return to enter the command.

Open Terminal, which is in the Utilities folder of your Applications folder.

Plug in the USB flash drive or other volume that you're using for the bootable installer.