for iMac - you need 2014 - and for those that think that even 2014 is broken by Big Sur: I'm sharing an iMac Late 2014 (the oldest computer that is said to work with Big Sur) It was very slow so we fully wiped the computer and installed a fresh copy of Big Sur, and it was still very slow, laggy etc. We left the computer on doing nothing for 2 days and now it's fully fast as it was before - there are 2 days of background update processes that the mac doesn't tell you about...

I'm sharing an iMac Late 2014 (the oldest computer that is said to work with Big Sur) It was very slow so we fully wiped the computer and installed a fresh copy of Big Sur, and it was still very slow, laggy etc. We left the computer on doing nothing for 2 days and now it's fully fast as it was before - there are 2 days of background update processes that the mac doesn't tell you about...

I'm sharing an iMac Late 2014 (the oldest computer that is said to work with Big Sur) It was very slow so we fully wiped the computer and installed a fresh copy of Big Sur, and it was still very slow, laggy etc. We left the computer on doing nothing for 2 days and now it's fully fast as it was before - there are 2 days of background update processes that the mac doesn't tell you about...

I'm sharing an iMac Late 2014 (the oldest computer that is said to work with Big Sur) It was very slow so we fully wiped the computer and installed a fresh copy of Big Sur, and it was still very slow, laggy etc. We left the computer on doing nothing for 2 days and now it's fully fast as it was before - there are 2 days of background update processes that the mac doesn't tell you about...

I'm sharing an iMac Late 2014 (the oldest computer that is said to work with Big Sur) It was very slow so we fully wiped the computer and installed a fresh copy of Big Sur, and it was still very slow, laggy etc. We left the computer on doing nothing for 2 days and now it's fully fast as it was before - there are 2 days of background update processes that the mac doesn't tell you about...