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I updated to 10.13.5, lost Bluetooth. I "reset" the module, trashed the BT preferences, nothing worked. Help?
MacBook Pro with Retina display, macOS High Sierra (10.13.5), iPad Pro 9.7, Watch 42mm, iPhone X
It has to be a bug in the firmware that effects (primarily at least) the 2015 chipset. Nearly everyone on here who has had a total loss of bluetooth (not partial, not recoverable etc) has the 2015 chipset.
I've decided not to go ahead with the hardware fix as yet on my work macbook as Apple wanted me to pay £150 for the work to happen. I'm waiting to see what the outcome is and instead have plugged in keyboard and mouse and headphones until there is no other option. I also won't be upgrading my personal macbook (also a 2015 model) until I have some form of fix or assurance from apple this will be fixed by them for free given their update caused the problem and now over 100+ people agree.
I have also now got my iMac booked in tomorrow for repair as i still have 4 months hardware support, yesterday i rebuilt my iMac and problem still exists although today while i was in Chat with support, we were trying different things to see if it fixed issue and he mentioned about noise causing problems for the BT module. I removed a thunderbolt to USB 3 adaptor i had plugged in as they can cause noise but problem still occurred after it was removed.
the issue for me is also kinda random when it will do it but always seems to be when a USB device is plugged in like iPhone/iPad or turned on.
I'll wait to see what the hardware engineers say tomorrow and if they do replace anything will update here.
I had to zap my PRam and the BT Module, then reload 10.3.5 Combo update to get it all working again. It is a serious OS issue. I’m saddened that Apple hasn’t released a fix for this issue yet. 02 July 2018.
My iMac is now fixed and working, many thanks to Stormfront(authorised Apple repairer) as my iMac repair only took 4 days turnaround. It also turned out it was the BT/Wireless module that had become faulty and was replaced under warranty.
Like others, my Bluetooth module broke when 10.13.5 was installed on a MacBook (Retina, 12-inch, Early 2015). I've tried all of the various ideas on this thread (NVRAM, SMC, .plist, shutdown overnight, ...) in a variety of orders and I got nowhere. I've delayed a visit to Apple for their advice as I hoped that 10.13.6 might fix it ... but alas, today's update hasn't helped. I'll be really disappointed if they try to charge me ...
Having this problem since 10.13.5 update. Unsuccessfully tried all those resetting stuff.
Today 10.14 has been installed - no news with bluetooth, still greyed. MacBook Pro (Retina, 15-inch, Mid 2015),
2.5 GHz Intel Core i7, 16 GB 1600 MHz DDR3
Apple Bluetooth Software Version: 6.0.8f6
Firmware Version: v5 c4096
Vendor ID: 0x0A5C
Product ID: 0x21FF
HCI Version: 4.1 (0x7)
Vendor ID: 0x0A5C
Product ID: 0x21FF
Vendor ID: 0x0A5C
Product ID: 0x21FF
Boot into macOS recovery
https://support.apple.com/en-us/HT201314
If Bluetooth doesn't work there, then it's definitely a hardware issue with your Mac and you need to have it serviced
I have this problem too, also reset the module, trashed the BT preferences and resetting SMC doesn't help.
The only fix is going back 10.13.4.
I put back 10.13.3 and also there is no bluetooth icon, or bluetooh module.
How does one revert and resurrect bluetooth without a mouse
Got usb mouse and ran diagnostics/ No issues detected. Problem persists, I notice 10..13.5 is no longer available on the App Store.
Reverted to 10.13.4 by time machine backup. Still no Bluetooth. Also stried switching off resetting Pram, resetting Bluetooth again, etc. to no avail.
Updated to 10.13.5, lost Bluetooth
