![]() ![]() Installation succeeded when installing onto the harddrive connected via USB. Turns out that something was wrong with the SATA/IR cable connecting the drive to the logic board. Which translates to something along the lines of "The installer payload failed signature check". Using a Macbook Pro with OS Sierra I got an USB Boot disk created, ran disk utility and started the install, which after about half an hour stopped the installation with the message: Does anybody know how to get fix this installation issue? The error message is in Danish and translates to something like: "Can’t download the additional components needed to install Mac OS X". Here's what I've done: installed SSD, connected power, Ethernet, booted into Internet Recovery using Command+R, formatted the disk using Disk Utility (Mac os Extended - Journaled), started re-install.īut then it gets the bar filled, stalls there for long time and the it I am trying to fix a Macbook Pro from around 2012/2013, the hard drive failed so I replaced it with a Sandisk 120GB SSD and I am trying to reinstall OS X Mountain Lion using Internet recovery.
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