If a Bluetooth mouse, keyboard or headset will not connect, start with the accessory’s charge and pairing state. A failed connection alone does not establish that the Mac’s Bluetooth hardware has failed.
Check one accessory at a time
- Make sure the accessory is charged, switched on and in its manufacturer’s pairing mode. Check whether it is already connected to another computer or phone.
- Open System Settings → Bluetooth on the Mac. Turn Bluetooth on and look for the accessory. If it is already listed but will not connect, disconnect and reconnect it. Use the manufacturer’s instructions if it needs to be paired again.
- For an Apple Magic accessory that supports cable pairing, Apple recommends connecting it to the Mac with its charging cable, waiting about a minute, and then disconnecting the cable.
- If headphones connect but sound plays through the computer, check the output device in Sound settings. Pairing and selecting the audio output are separate steps.
- Save your work and restart the Mac if the problem remains. Note whether a second known-working accessory behaves differently.
Make the result useful
Record the Mac model, macOS version, accessory model and exact symptom: not listed, pairing rejected, repeatedly disconnecting, or connected without sound. If only one accessory fails, include what happens when it connects to a different compatible device. These observations narrow the next investigation; they are not a diagnosis by themselves.
Do not buy a generic Bluetooth adapter on the assumption that every adapter supports your macOS version or fixes the underlying issue. Check compatibility before spending money.
When to ask for help
If Bluetooth is unavailable in settings or several known-working accessories still fail, ask for diagnosis rather than assuming a logic-board replacement is necessary. For a business computer, record which task is interrupted and whether another device can keep that task running. Avoid sharing passwords or private customer files in an initial message.
For local help, see computer repair in Marion, Ohio or contact LC at (740) 223-5530. Describe the symptoms and ask whether the model and job fit LC’s service scope before arranging work.
Reference: Apple: connecting a Magic Keyboard, Magic Mouse or Magic Trackpad.
Reference: Apple: connecting a Bluetooth device to a Mac.
Updated October 2, 2026. General troubleshooting guidance; the linked Apple documentation explains model-specific details.