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How to check a used MacBook before you buy it

Updated September 26, 2026

Test your device now in the browser, free, no app needed.

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.

Check your whole deviceScreen, touch, speakers, microphone, cameras, battery and more, right in the browser. Free, with a PDF report and a QR code to share.

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