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After Catalina upgrade, Bluetooth fails to discover devices on Macbook Pro Early 2015

After Catalina upgrade, Bluetooth fails to discover devices on Macbook Pro Early 2015. Has anyone ran into this issue and fixed it?


The Apple Bluetooth Software Version is 7.0.4f6

Bluetooth Chipset is Broadcom 20703A1

MacBook Pro 13", macOS 10.15

Posted on Apr 26, 2020 9:02 PM

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Posted on Apr 27, 2020 5:38 AM

kchai007 wrote:

After Catalina upgrade, Bluetooth fails to discover devices on Macbook Pro Early 2015. Has anyone ran into this issue and fixed it?

The Apple Bluetooth Software Version is 7.0.4f6
Bluetooth Chipset is Broadcom 20703A1



From the Bluetooth icon upper right menu bar, hold the Shift Option keys to click open<Debug>Reset


Using a Bluetooth mouse, keyboard, or trackpad with your Mac


8 replies
Question marked as Best reply

Apr 27, 2020 5:38 AM in response to kchai007

kchai007 wrote:

After Catalina upgrade, Bluetooth fails to discover devices on Macbook Pro Early 2015. Has anyone ran into this issue and fixed it?

The Apple Bluetooth Software Version is 7.0.4f6
Bluetooth Chipset is Broadcom 20703A1



From the Bluetooth icon upper right menu bar, hold the Shift Option keys to click open<Debug>Reset


Using a Bluetooth mouse, keyboard, or trackpad with your Mac


May 31, 2020 11:23 AM in response to leroydouglas

Hi Leroy,


The <Debug>Reset trick doe not resolve the issue, and I suspect it has to do with the Bluetooth firmware being outdated.

Bluetooth is currently not working.


From Mojave to Catalina 15.5.x (where x<=4), Bluetooth did not work, the system report shown -

Apple Bluetooth Software: 7.0.4f6 Bluetooth Firmware Version: v5 c4096


Somehow, one day, Bluetooth started to work automagically, the system reports shown -

Apple Bluetooth Software: 7.0.4f6 Bluetooth Firmware Version: v169 c4825


From Catalina 15.5.4 to 15.5.5, Bluetooth did not work, the system report shown -

Apple Bluetooth Software: 7.0.5f6 Bluetooth Firmware Version: v5 c4096



Jul 13, 2020 12:37 PM in response to kchai007

Yes, I have a (kind of) solution. It's quite tricky, but it works:


1) Install Windows 10 via Bootcamp assistant (yes. windows)


2) Download to the USB flash drive these drivers https://www.dell.com/support/home/ru-ua/drivers/DriversDetails?driverId=2JM87 . The only what you need to do is launching a file with drivers (take attention - it won't be installed automatically!!!) and select the known place of unpacking on your hard drive (it's better to choose C: volume)


3) On the "Devices" menu on Windows find the unknown device called "BCM2045A0."


4) Install unpacked (see point 2) drivers manually


5) Try to connect any BT device via Windows Bluetooth manager


6) Reboot to MacOS


Tips:

DO NOT DELETE Windows! Each time you'll reboot your macOS, the BT module will not be working again. Just reboot to Windows, connect any device, and reboot to MacOS

Turn your Mac to the sleeping mode instead of rebooting - BT will work as it should


P.S. I don't know what's changing exactly and how it works, but it works.

After Catalina upgrade, Bluetooth fails to discover devices on Macbook Pro Early 2015

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