Bluetooth connection unexpectedly timing out with macOS Sequoia

Question

Created Sep ’24

Replies 5

Boosts 4

Views 1.1k

Participants 6

After the macOS Sequoia update, my app seems to have an issue with Bluetooth communication between macOS and iOS that uses CoreBluetooth for Central-Peripheral communication.

Setup:

The iPhone (in my case: iPhone 14 Pro with iOS 18.0 (22A3354)) acts as the Central, and the Mac (in my case: 14" MacBook Pro 2023 with macOS 15.0 (24A335)) as the Peripheral.
I’ve implemented a mechanism where the Central (iPhone) sends a message to the Peripheral (Mac) every 15 seconds to keep the connection alive (Because it needs to wait for notify characteristic updates).
I never noticed this kind of issue before, but with macOS Sequoia I get it permanently.

Issue:

The connection drops unexpectedly after a period of time (sometimes 20 seconds, sometimes a few minutes) with CBErrorDomain - code 6: The connection has timed out unexpectedly.

Sample Code:

Peripheral (Mac):

ContentView (Peripheral).txt

ContentViewModel (Peripheral).txt

Central (iPhone):

ContentView (Central).txt

ContentViewModel (Central).txt

Reproduce:

I attached sample code including the Central-Sample (for iPhone) and Peripheral-Sample (for Mac).

Just run the Peripheral-Sample (after granting Bluetooth permissions).
Then run the Central-Sample and select the Mac device in the list
After selecting it should connect, discover the service & characteristic and should start writing messages to it.
After some time the func centralManager(_ central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: (any Error)?) {should get called with timed out unexpectedly error.

Could anyone please look into this issue and advise on whether there’s a known bug or any workaround? Any guidance would be greatly appreciated, as this impacts the stability of Bluetooth communication between the devices.

Thanks in advance.

Logs:

I also ran the console.app during this issue which got these errors (if this is helpful):

console_logs.txt

Boost

Answer 1

WorldOfBasti OP

Sep ’24

Ok, I found out that this issue occurs more often when Magic Mouse and Magic Keyboard are connected via Bluetooth.

It looks like Sequoia broke Bluetooth connections in general:

https://www.reddit.com/r/mac/comments/1fl1swq/bluetooth_problems_from_macos_sequoia_update/
https://forums.macrumors.com/threads/sequoia-bluetooth-issues-same-as-on-ventura.2437813/
https://discussions.apple.com/thread/255766537?sortBy=rank

2

Answer 2

thegodone_ OP

Sep ’24

I have exactly this issue with bluetooth on my remote keyboards too. Any fix ?

2

Answer 3

Ygee OP

Oct ’24

Same. Feels like a mouse lag. Mostly encountered it when doing drag and drop, and highlighting a bunch of text.

2

Answer 4

contact411 OP

Oct ’24

My Logitech MX Keys Mini for Mac keyboard seems to fall a sleep intermittently and wakes back up after less than a second.

Very painful to deal with. Power cycling the keyboard feels like it helps for a bit. Definite possibility I'm an optimist and this has no effect on the problem.

Hopefully we see an update soon.

2

Answer 5

Wiesler OP

1w

My Logitech Mx3 Master mouse seems to be working fine, same with magic keyboard after Sequoia 15.1 update.

The problem is my Sony XM4 headset. There is a constant micro pauses and interruptions of the music making it completely unusable. Works fine when I pair them to my other devices so only my macbook pro M2 Max.

0