PSA: Magic Mouse / Bluetooth Mouse Lag (Cause is Sidecar)

Hey. This isn’t really a question, but I just wanted to post it because I’ve had a maddening lag with my Magic Mouse when using it with my laptop and I tried everything. The culprit turned out to be Sidecar. When I disconnected my iPad from Sidecar mode, the lag was resolved. So if you’re having lag issues and you’re connected to Sidecar, try disconnecting and see if that resolves your issue. Hope this helps!

By the way, this only started to happen recently. I’m guessing a recent macOS 10.15.x update caused the issue and at the time of this writing, macOS 10.15.6 has this issue. (If you’re curious, I’m using a 2017 iPad Pro 10.5” with iOS 13.7, so it could be an iOS bug, who knows!). And I also use a wired connection, not wireless.