It appears that if you replaced your existing Apple SSD with a new one from another manufacturer, the firmware update can fail. Which results in the whole install / update failing.
Creating a USB installer doesn't solve the problem.
Some people have installed their original SSD, finished the...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.