A Mac Studio is used with whatever keyboard and mouse or trackpad you attach, so a keyboard or trackpad that misbehaves on one is usually a pairing, power or connection problem and not a fault in the Mac, and the checks are short. If you use Apple's Magic Keyboard, Magic Mouse or Magic Trackpad, start with their batteries: they charge over a cable and a low battery causes lag, missed keys and disconnects. Plug the accessory in with its cable and see whether it works wired, which proves the accessory and the Mac and rules out Bluetooth.
The checks in more detail
If it works by cable and not wirelessly, the Bluetooth link is the issue. In System Settings, Bluetooth, remove the accessory and pair it again by connecting it with its cable and then removing the cable. Keep the accessory within a few meters without a metal object between it and the Studio, since the Studio's metal case can weaken the signal if it sits behind the machine. Other things interfere with Bluetooth on a desk:
a USB-C hub or an external drive plugged in right next to the receiving side, a wireless router on the same shelf and a cluttered 2.4 GHz band, so move the hub or use a USB extension and test again. At start-up, a Mac Studio without a connected keyboard or mouse can show a prompt to connect, and a wireless keyboard may not work in Recovery until it has paired, so keep a wired keyboard to hand for the occasion.
Check System Settings, Keyboard and Trackpad for settings that change behavior, such as Key repeat, Tap to click and Mouse Keys, since an accessibility feature switched on by accident can look like a fault. Restart the Mac, update macOS and check for firmware updates on the accessory, which arrive with macOS. A third-party keyboard or mouse may need its own dongle or app. If a keyboard misses keys on every Mac you try, it is the keyboard; if every accessory fails only on the Studio, ask Apple to check the Bluetooth hardware.
Differential
Likely causes of “Apple Mac Studio keyboard or trackpad is not working correctly”, and how to tell them apart
- 1
A low accessory battery
What separates it Lag, missed keys or disconnects
How to confirm Charge it by cable
- 2
A stale Bluetooth pairing
What separates it The accessory shows but does not respond
How to confirm Remove it in Bluetooth settings and pair again
- 3
Interference from a hub or router
What separates it Drops when a hub is plugged in
How to confirm Move the hub or use an extension cable
- 4
An accessibility setting
What separates it Odd behavior such as repeated keys
How to confirm Check Keyboard and Accessibility settings
- 5
An accessory fault
What separates it It fails on every Mac
How to confirm Replace the accessory
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether it works by cable
- The battery level
- What is plugged in nearby
- The accessory model
Try in this order
0 of 6 completedTest by cable
ReversiblePlug the accessory in to separate the accessory from Bluetooth.
Charge it
ReversibleA low battery causes odd behavior.
Pair again
ReversibleRemove it in Bluetooth settings and re-pair by cable.
Move interference
ReversibleHubs and drives near the receiving side.
Check accessibility settings
ReversibleIn Keyboard and Accessibility.
Restart and update
ReversibleThe Mac and accessory firmware.
Model-specific
What is true of this model and not of its siblings
- Accessories vary
- The Studio has no built-in keyboard.
- Recovery
- A wired keyboard is the safe fallback.
Stop boundary
When this stops being a self-service repair
- !If every accessory fails on the Studio only, contact Apple
- !If one accessory fails everywhere, replace it
- !Keep macOS updated
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why does my Magic Keyboard lag on my Mac Studio?+
A low battery, interference or a stale pairing.
Does a wired keyboard help in Recovery?+
Yes, keep one to hand.
Can a USB-C hub disturb Bluetooth?+
Yes, if it sits next to the receiver.
How do I re-pair?+
Remove the accessory and pair by cable.