Latency or lag on a Bluetooth mouse on a Mac is usually caused by a variety of factors, including wireless interference, low battery, system problems, or multi-device connection overload. 1. Wireless device interference: Keep your Mac and mouse away from interference sources such as routers, USB 3.0 devices, or switch Wi-Fi to the 5 GHz band. 2. Mouse battery level is insufficient: check the battery status and replace the battery through the system settings or the mouse’s own indicator light. 3. System or Bluetooth driver is not updated: Go to System Settings to update macOS and try to reset the Bluetooth module through the debug menu. 4. Too many Bluetooth devices: Disconnect unused peripherals, or use a Bluetooth USB adapter to share the load. Gradually checking the above problems can effectively solve the phenomenon of mouse lag.

Bluetooth mouse lag or stuttering on a Mac can be frustrating, especially when you're in the middle of work or browser. It's usually not a single cause — more often, it's a mix of environmental factors, software conflicts, or hardware limitations.

Here are the most common reasons and what you can do about them:

1. Interference from Other Wireless Devices

Bluetooth relies on the 2.4 GHz frequent band, which is also used by Wi-Fi routers, cordless phones, microwaves, and even some USB 3.0 devices. If your mouse starts stuttering when you're using other wireless gear or near certain electronics, interference is likely the culprit.

What to do:

• Move your Mac and mouse away from routers, speakers, or other Bluetooth/Wi-Fi devices.
• Try unplugging any neary USB 3.0 hubs or external drives — they're known to interfere with Bluetooth signals.
• If possible, switch your Wi-Fi router to a 5 GHz band (if supported), leaving the 2.4 GHz band less crowded.

2. Low Battery in Your Mouse

This one's easy to overlook. When the battery in your Bluetooth mouse runs low, it can't maintain a stable connection, leading to lag or erratic behavior.

What to check:

• Go to System Settings > Bluetooth , and look for your mouse. Some mice will show battery percentage here.
• If you don't see a battery indicator, check the mouse itself — some have LED indicators or companion apps that show battery status.
• Replace or recharge the batteries as needed.

3. Outdated macOS or Bluetooth Driver Issues

Apple regularly releases updates that improve compatibility and fix bugs — including Bluetooth-related ones. If your system hasn't been updated in a while, that might be part of the issue.

How to update:

• Go to System Settings > General > Software Update and install any available updates.
• You can also try resetting the Bluetooth module:
  • Hold down Shift Option and click the Bluetooth icon in the menu bar.
  • Choose Debug > Remove All Devices , then Debug > Reset the Bluetooth Module .
  • Reconnect your mouse afterward.

4. Too Many Connected Bluetooth Devices

If you have multiple Bluetooth peripherals connected (like headphones, a keyboard, and a mouse), your Mac might struggle to manage all of them at once — especially if it's an older model.

Try this:

• Disconnect any unused Bluetooth devices.
• If you're using a lot of accessories, consider using a Bluetooth USB adapter to offload some connections.

It's usually not just one thing causing the problem — it's a combination of small issues stacking up. Start with the easiest fixes like checking the battery and removing interference sources. From there, reset Bluetooth or update your OS if needed.

Basically that's it.

The above is the detailed content of Why is my Bluetooth mouse lagging or stuttering on my Mac?. For more information, please follow other related articles on the PHP Chinese website!