yes you can absolutely pair your apple mouse with multiple apple devices
On my mac mini I have lots of BT devices, and it seems like everything works perfectly with five devices connected simultaneously. If I connect one more, in the bluetooth control panel, another will disconnect. My everyday setup is three mice, two keyboards, all apple magic. All solid and stable. Occationally I use BT headphones, earpods and an iPad. It's easy to manage the connected devices in the bluetooth menu item.
("Why so many mice/keyboards" you might ask. It's because I have three spots in my living room from which I work on the mac; 1. sitting close to a 32" monitor at a desk. 2. sitting 10-12 feet away in my comfy chair, viewing the mac on my 55" OLED TV right above the 32". 3. Standing in the middle of the room, in the 'sweet spot' in relation to my speakers, controlling my audio software with mixing gear. Keyboard and mouse in each of the three spots.)
Here's what google AI says:
Yes, there is a limit. While Bluetooth specifications theoretically allow up to seven devices, Macs typically face a practical limit of
three to four active devices simultaneously before experiencing performance issues like audio skipping or input lag. Performance varies based on the data demands of the devices (e.g., audio is more demanding than a mouse).
Key Considerations for Mac Bluetooth Limits
- Theoretical vs. Practical: Seven devices is the max, but users often find stability issues beyond three or four active devices.
- Performance Issues: Connecting too many devices (like a mouse, keyboard, and headphones) can cause lagging in audio.