I have a 27" 2015 iMac, who's bluetooth stopped functioning immediately after upgrading from Mojave 10.14.2 to 10.14.3. Multiple calls/troubleshooting with Apple included doing the most extreme text/fix of wiping my computer of all data, reinstalling a fresh system -- and still, Bluetooth did not appear under About This Mac/Hardware. After reading Abertheham's swell Instructable, I found the recommended dongle on NewEgg, and also downloaded the developer tools. I plugged in the dongle, and was about to run the developer software, when I noticed that my Bluetooth menu icon was already in place again -- with my bluetooth items (mouse, airpods) listed as usual. So I actually did not have to run any software. (And as a test, to see if just plugging the dongle in had fixed some association to my computer with bluetooth capabilities -- I unplugged the dongle, and bluetooth went away. So the dongle IS the source of the bluetooth.)I hadn't realized that bluetooth dongles existed and were an inexpensive/easy way to bring bluetooth functionality to a broken Mac. When looking for where to purchase this dongle, there were a lot of similar gizmos that all said they were NOT Mac-compatible. I don't know if in actually they might also be recognized just as easily by a contemporary model machine -- but I decided not to test that and just went with the specific dongle that Abertheham suggested.Thanks for taking the time to write this up -- and although my situation was different than yours -- reading your instructions still helped to resolve my problem.
Bluetooth Explorer Utility Mac Download
I was pointed in the direction of the Mac developer utility Bluetooth Explorer, which can be freely downloaded off Apple's developer portal. Strangely enough, Apple seems to have discontinued this utility for the latest versions of XCode, but it seems the version from Xcode 11.4 still works. 2ff7e9595c
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