Installing Mac OS on external SSD

  ML_DK 15:53 28 Dec 2017
Locked

Hi I'm trying to install high sierra on a external SSD (250GB) it's formatted in mac os expanded. the installation shuts down when the computer reboots during the installation. The installation program gives me the 2 errors you see in the attached image. first it says that the disk is to small, and then it gives me a error "System/Installation/packages/OSInstall.mpkg is damaged"

I've also tried to instal from reboot (cmd+r) and then selecting repari/reinstall, on the external hdd - same errors as above. - and i've tried downloading os sierra 3 times now to make sure, it wasn't a bad file in the installationfile.

What am i doing wrong? Why is it nessesery to reboot the computer, when i'm installing on a secondary hdd.

BR

Martin

  BRYNIT 17:50 28 Dec 2017

You could have a read of CLICK HERE might give you some help.

This thread is now locked and can not be replied to.

Elsewhere on IDG sites

Amazon Prime Day 2018: Best Deals & Launches

The humble pint glass is redesigned from bottoms up by design legend Sir Kenneth Grange

The best Amazon Prime Day Apple deals 2018

Quel est le meilleur antivirus pour Windows ?