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How to check a used MacBook before you buy it

Updated September 26, 2026

MacBooks hold their value and last well, so the used market is busy. But they come with traps a Windows laptop doesn't have: Activation Lock, ex-corporate machines stuck in MDM, and some model years with known design flaws. This guide focuses on those; for the general checks (screen, ports, hinges) see also how to check a used laptop.

Tip: open soimay.com in Safari or Chrome on the MacBook itself; nothing needs installing.

1. Activation Lock and Find My Mac

MacBooks with Apple silicon (M1 and later) or the T2 security chip have Activation Lock, just like an iPhone: if the previous owner's account is still attached, the Mac locks after reinstalling.

  • Hold Option, open the Apple menu › System Information › Hardware. Activation Lock Status must say Disabled.
  • In System Settings, the account name at the top must be empty (signed out of the Apple Account) and Find My Mac must be off.
  • Best: have the seller run Erase All Content and Settings (System Settings › General › Transfer or Reset) in front of you.

2. Company MacBooks stuck in MDM

Many ex-corporate MacBooks are still enrolled in the company's device management (MDM, Apple Business Manager). After a reinstall they show a "Remote Management" screen and stay under the old company's control.

  • Check System Settings › General › Device Management: there should be no profiles. (Older macOS: Privacy & Security › Profiles.)
  • Open Terminal and type profiles status -type enrollment. It must say Enrolled via DEP: No and MDM enrollment: No.

Be extra careful with an unusually cheap MacBook that is enrolled in MDM: it is not something you can remove yourself.

3. The right model and specs

Apple menu › About This Mac shows the model (for example MacBook Air M2, 2022), chip, memory and serial number. Enter the serial on Apple's coverage check page to cross-check.

Apple silicon MacBooks have soldered RAM and SSDs that can't be upgraded, so make sure the configuration will be enough for years to come.

4. Battery and cycle count

  • System Settings › Battery, click ⓘ next to Battery Health: it should say Normal. Apple silicon Macs also show the maximum capacity (%).
  • System Information › Power: Cycle Count is the number of charge cycles. Most MacBooks are designed for 1,000 cycles; under 300–400 is very healthy.

More in how to check battery health.

5. Screen: anti-reflective coating wear

Retina MacBook Pros and Airs from roughly 2012–2017 often suffer from anti-reflective coating delamination: blotches that look like stains when the screen is off, especially near the edges. Look at the screen switched off under a light, then fill it with each colour to find dead pixels and backlight bleed.

Dead pixel, backlight bleed and burn-in testFind dead or stuck pixels, backlight bleed, burn-in and lines on a phone or laptop screen. Eight full-screen colours, free, no app to install.

13-inch MacBook Pros from 2016–2017 also have the "flexgate" fault: a weak display cable causes a stage-light glow along the bottom of the screen as the lid opens. Check the screen at several angles.

6. Keyboard: watch out for "butterfly" models

The 12-inch MacBook, MacBook Pros from 2016–2019 and MacBook Airs from 2018–2019 use the butterfly keyboard, notorious for sticky, repeating or dead keys. Press every key and type a paragraph. Hold fn when testing the F1–F12 row.

Laptop keyboard testPress every key to find dead or stuck keys on a Windows laptop or MacBook. Blocks F5 and F12, with a keyboard-lock mode to test F11, Esc and the Windows key too.

7. Trackpad and Touch ID

The Force Touch trackpad should click evenly everywhere (it has no real moving button; the click is haptic). Try clicking, force clicking, scrolling and zooming.

Touchpad and mouse testTest a laptop touchpad or mouse: left, right and double click, vertical and horizontal scroll, pinch to zoom, and a cursor that doesn't jump.

Add your fingerprint in System Settings › Touch ID & Password to check Touch ID, or use the fingerprint test.

8. Temperature and performance

Run the CPU test: a fanless Apple silicon MacBook Air getting warm and slowing slightly is normal; on a MacBook Pro the fan should spin up quietly without rattling.

9. Speakers, microphone, camera, ports

Play the speakers loud and listen for crackling, record a sample, open the camera. Plug the charger into every USB-C/Thunderbolt port (or MagSafe) to make sure each one charges.

10. Body

Check for dented corners (usually from a drop) and that the lid closes evenly. A bulging bottom case or raised trackpad means a swollen battery.

Save the results

On the soimay.com Results page, save a PDF or report link as a record. Things to check by hand are in the manual checklist.

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