[tezra]

I have a 2011 iMac,2.7 GHz Intel Core i5 with 16 RAM. Ever since the latest OS upload, my Bluetooth shuts off randomly. When I go to systems preferences/Bluetooth, the option to turn Bluetooth on is greyed out. The only way I can turn it back on is to restart. The batteries in my keyboard and my magic mouse are new. Please help, for this is very upsetting. Thank you.

[Lee_Bo]

I have the same year and model but don't use it daily. I have seen times when tapping the space bar didn't wake it. I'll keep notice and see if nine does it. And it's the latest OS?

[tezra]

yes, latest OS. It's very erratic, sometimes I have connectivity for a half hour, sometimes ten minutes.

[dcoke22]

You might have some interference causing problems. Apple has some words about sources of interference. Or, perhaps, the 7-year-old computer is having a hardware failure. Apple has a Hardware Test you can run.

Finally, even though it is a pain, you could try reinstalling macOS.