If you are getting the answer to this question, dear friends, here's the answer: I hope it will help you. Fix MacOs: This Item Is Temporarily Unavailable. Please Try Again Later error https://www.knowerstech.com/fix-macos-this-item-is-temporarily-unavailable-please-try-again-later-error/
The first thing you will know is the right thing; device is using the apple ID you used previously. you may receive this error because of a different apple ID. if you don’t remember your old apple id, please format it with usb in the last article.
Check the time of your device first. If the time date is wrong, open the mac terminal and correct the time date with the date command. If the date is incorrect, you’ll also often get the following error: An error occurred while preparing the installation, Try running this application again. these two errors may be due to time-date error.
Try opening your apple account at icloud.com in the online help on the setup screen.
