Half the keys respond, one row types nothing, or the whole deck has gone dead mid-sentence. A MacBook Air keyboard not working is rarely the hardware on day one. Most of the time it is a setting, a frozen process or a film of dust, and you can sort that out at the kitchen table in about 20 minutes with nothing but a cloth and a second keyboard.

Quick Answer

Plug in or pair an external keyboard, then check System Settings and boot into Safe Mode before you decide anything is broken. If the external keyboard works and the built-in one still does not after a dry clean, the keyboard itself has probably failed. At that point a replacement such as the MacBook Air 13" M5 (512GB) - Midnight at R24,999 is the other route, once you have ruled out a repair.

🔌 Test with an external keyboard first

This one test splits software faults from hardware faults. Connect any USB keyboard through a USB-C adapter, or pair a Bluetooth one under System Settings > Bluetooth. Open Notes and type a full sentence.

If the external keyboard types fine, macOS is healthy and the fault sits with the built-in keys or their connection. If the external one misbehaves too, stop blaming the hardware: the problem is in macOS, and the next section is where you will find it. A spare keyboard from the keyboard range also keeps you working while you troubleshoot.

⚙️ Check System Settings and Safe Mode

Three software causes account for most dead-key complaints. Work through them in order.

  1. Slow Keys and Sticky Keys. Open System Settings > Accessibility > Keyboard and make sure both are off. Slow Keys makes you hold each key for a beat, which feels exactly like a faulty keyboard.
  2. Wrong input source. Under System Settings > Keyboard > Input Sources, remove any layout you do not use. A stray layout swaps symbols and makes keys seem to type the wrong thing.
  3. Safe Mode. On Apple silicon, shut down, then hold the power button until Startup Options appears. Pick your disk, hold Shift and click Continue in Safe Mode. Test the keys there. If they work, a login item or third-party utility is intercepting input, so remove recent ones from System Settings > General > Login Items.

Restart normally once you finish; a plain restart clears many stuck-key faults.

🧹 Clean the key gaps, especially in a dry Highveld winter

Dust is common in Pretoria homes from June to August, when the air is dry and the wind lifts grit off every surface. It settles under key edges and stops a key from returning fully. Power the MacBook off, tilt it to about 75 degrees, and sweep a dry microfibre cloth along each key row. Short bursts of compressed air, held a few centimetres away, clear what the cloth misses.

Never use liquid or spray anything onto the keys. If coffee or water went in, power off at once and leave the machine alone until it is looked at, because moisture does its damage while the board is live.

🛠️ When the hardware is the problem

Run Apple Diagnostics before you give up. On Apple silicon, shut down, hold the power button until Startup Options appears, then press Command-D. A reference code that points at the keyboard or logic board confirms a physical fault, and a few dead keys that survived Safe Mode and a clean point the same way.

At that stage the unit may be faulty, so this is a warranty question rather than a home fix.

TIP

Faulty unit? Stop here

Home fixes end at this point. For returns, refunds and warranty claims, see our Returns and Warranty policy.

If the machine has reached the end of its useful life, browse the MacBook range for a current model.

Frequently Asked Questions

Why do only some keys on my MacBook Air stop working?

Partial failures usually come from debris under individual keys or from Slow Keys being on. Clean the affected row first, then check System Settings > Accessibility > Keyboard.

Can I keep using my MacBook Air with an external keyboard?

Yes. A USB or Bluetooth keyboard works at once and bypasses the built-in one entirely, so you can carry on with work while you sort out the cause.

How do I know if the fault is hardware?

If the external keyboard works, the built-in keys fail in Safe Mode, and Apple Diagnostics flags the keyboard, the fault is physical.

Need a keyboard while yours is sorted? Browse the Evetech keyboard category for a USB or Bluetooth option that keeps you typing in the meantime.