MacBook Air 2013

Hi there Mountside21,

We understand you're experiencing an issue with updating your MacBook Air to macOS Big Sur, and we'd like to see if we can assist.

To get started, disconnect any peripheral devices, and attempt the macOS install again.

If the install issue persists, create a new user account, and try installing macOS Big Sur there: Set up users, guests, and groups on Mac

Should you experience the same install issue, delete the installer file, and try downloading it again.

We hope this helps.

Mountside21,

Thanks for giving those steps a try, and keeping us updated on the results.

We're glad to hear you were able to get your MacBook Air updated to macOS Big Sur, and that Safari is working as expected for you now.

Feel free to post again if you have any questions in the future.

Take care!