Blog about software development


OSX clean install error messages

26 Jul 2020 - by 'Maurits van der Schee'

When you buy a second hand Mac you should do a clean install of OSX from a USB drive for security reasons. This sounds easy, but there are some problems you may run into. In this post we discuss 2 common, but cryptic, error messages and explain how to avoid them. Note that a clean installation requires you to have a USB drive with a bootable OSX installer. Note that on newer Macs you don't need an USB drive as these support macOS Recovery over the Internet by pressing Option-Command-R after boot.

Error: This Item Is Temporarily Unavailable

This (most likely) means that the hard-disk was not empty during installation.


See: https://www.youtube.com/watch?v=W7bPfNREVMU

Error: No packages were eligible for install

This means that the date should be set (back!) to a date when the certificate for the OS was valid.


See: https://discussions.apple.com/thread/250793420

PS: Liked this article? Please share it on Facebook, Twitter or LinkedIn.