Installing OS X on my mac computer
Whenever I try to install OS X a message pops up saying this item is temporarily unavailable... why does this happen and what can I do to to resolve the issue? TIA
iMac
This item is temporarily unavailable Mac … - Apple Community
Start up from macOS Recovery
To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following combinations on your keyboard. Command-R is generally recommended, especially if you never installed macOS Sierra 10.12.4 or later… How to reinstall macOS - Apple Support
Command (⌘)-R
Install the latest macOS that was installed on your Mac.
Option-⌘-R
Upgrade to the latest macOS compatible with your Mac.
Shift-Option-⌘-R
Install the macOS that came with your Mac, or the closest version still available.