I have a iMac retina 4k 2017, down loaded Big sir and it won update keeps saying error and its compatible. Issues with new software? any body else having this issue?

Hi lewis-1,

Thank you for reaching out in Apple Support Communities. We understand an error message appears, when you attempt to download the update for macOS Big Sur. We'll be happy to help.

With the error message you're seeing, we recommend to restart your Mac and attempt the update again. Here's two helpful articles on how to perform each step:

1. Log out, sleep, wake, restart, or shut down your Mac
2. How to update the software on your Mac

Please let us know if that helps.

Kind regards.

lewis-1,

That's wonderful to hear! Thanks for getting back to us and for providing that update.

Have a wonderful rest of your day.

Take care.