Mac reinstall OS this item is temporarily unavailable

[spartaman64]

I wanted to reset my iMac so I went into recovery and wiped the disk but when I tried to reinstall the OS it says this item is temporarily unavailable. I'm using the original Apple ID and I tried going to get help online and signing into icloud and I still get the error. 

[duncannah]

Try these steps:

1. Shut down your Mac.
2. Hold down Command-Option/Alt-R and press the Power button. (On some Mac keyboards the Option key will be named Alt).
3. Hold down those keys until you a spinning globe and the message "Starting Internet Recovery. This may take a while".
4. The message will be replaced with a progress bar. Wait for it to fill. Expect it to take a while...
5. Wait for the MacOS Utilities screen to appear.
6. Click Reinstall macOS and follow the installation process.

[CrowDazzle]

What year is your iMac? If it has a Fusion drive you you may need to re-combine the drive before install. It's been awhile since I've had an iMac so I'm going off some fuzzy memory.