Prepare my internal HDD MAC OS Disk externally
I think I can. BUT .
I want to remove the internal HD from my Mac Book Pro .
Place in a chassis.
Then prepare it. Meaning I want to set it up with Mountain X Pro as a bootable drive.
When that is al working I then want to install that HD back into my MAC and boot up from it.
No external drives
Is this OK to do this ?
I am doing this as I just do not seem to be able to get the erase internal disk not greyed out so I can go through the reinstall of MAC OS. So I thought I would do it all externally by connecting it to USB port. The MAC can find my USB devices.