You found a MacBook that looks interesting on Kijiji or Facebook Marketplace. The price seems fair, the photos look honest, the seller responds quickly. But before you confirm the meeting and show up with cash, there are 7 checks you need to run.
Some happen before the meetup (by message). Others happen in person, Mac in hand. Together, they take under 15 minutes and can save you a lot of money.
Before the Meetup: Questions to Ask by Message
Before even making the trip, ask the seller these questions. The answers give you a first read on their good faith.
"Can you share the serial number?"
An honest seller shares it without hesitation. With the serial number, you can go to checkcoverage.apple.com to verify:
- Does the model match what's advertised?
- Is there active AppleCare coverage?
- Is the device recognized by Apple?
If the serial number doesn't match the listed model, that's a major red flag.
"Is Find My Mac disabled?"
A conscientious seller will have done their homework. If they say "yes," you'll verify in person. If they say "what?" or hesitate, that's a sign they don't know the basics of selling a Mac — and probably haven't disabled Activation Lock.
"Do you have a ClariMac certification report?"
More and more serious sellers have one. If so, ask for the link — you get access to all the data before even meeting up.
The 7 Essential In-Person Checks
Check 1 — Activation Lock
This is the most important check. A Mac with Activation Lock active is a Mac you won't be able to use.
How to verify:
- Ask the seller to fully restart the Mac (not from sleep mode)
- If the startup screen asks for an Apple ID and password: Activation Lock active → walk away
- If the Mac starts normally, go to System Settings → [Apple ID name] → iCloud → Find My
- If Find My is enabled, ask the seller to disable it by entering their Apple ID password in front of you
The Mac should then be cleanly erased and returned to you with no linked account.
Check 2 — MDM (Corporate Management)
MDM is the "remote pilot" that companies use. A corporate Mac may have an MDM that survives an erase and can render the device unusable or reclaim it remotely.
How to check in Terminal:
profiles status -type enrollment
- Response "MDM enrollment: No" → No MDM. You're good.
- Response "MDM enrollment: Yes" → Active MDM. The seller must contact their former organization to remove it, otherwise don't buy.
Also open System Settings → Privacy & Security → Profiles — if you see profiles listed, there's likely an MDM.
Check 3 — Battery
A MacBook's battery degrades over time and charge cycles. A battery at 60% health means a Mac that lasts 3–4 hours instead of 8–10. And a battery in poor condition can swell and damage the chassis.
How to verify:
Apple menu → About This Mac → System Information → Power
Look at:
- Cycle Count: number of full charge cycles
- Maximum Capacity: health percentage compared to new
- Condition: Normal / Service Recommended / Replace Now
| Cycles | Health | Verdict | |--------|--------|---------| | < 300 | > 85% | Excellent | | 300–500 | 75–85% | Good | | 500–800 | 65–75% | Acceptable (price accordingly) | | > 800 | < 65% | Avoid or negotiate hard |
Battery replacement at Apple costs between $149 and $249 depending on the model. Negotiate accordingly.
Check 4 — SSD Disk
MacBook SSDs are very reliable, but not indestructible. A failing or near-end-of-life SSD can cause data loss and failures.
How to verify:
Open Disk Utility (Applications → Utilities → Disk Utility). Select the main drive. Click "First Aid." If it reports errors it cannot repair, the disk is compromised.
For a deeper check in Terminal:
diskutil info disk0 | grep SMART
- SMART Status: Verified → Disk in good health
- SMART Status: Failing → Disk dying → avoid at all costs
Check 5 — Components (Screen, Camera, Ports)
A quick visual test that takes 3 minutes.
Screen:
- Set brightness to maximum and look at the screen on a white background (open a blank page in Safari). Dead pixels appear as black or colored dots that don't move.
- Change the wallpaper to pure black. Brighter areas reveal image retention.
- Check the screen edges and corners — impacts and cracks under the panel often appear in bright light.
Camera:
- Open Photo Booth or FaceTime. The image should be sharp, with no green or black pixels.
Ports:
- Plug a cable or charger into each USB-C/Thunderbolt port. All should recognize the device.
- For older Macs with HDMI, SD, MagSafe ports: test each if possible.
Keyboard and trackpad:
- Open TextEdit and type every key. Look for keys that don't register or repeat.
- The trackpad should click uniformly in all corners without abnormal resistance.
Speakers:
- Play an audio file at maximum volume. Blown speakers crackle or distort.
Check 6 — Secure Boot and SIP
These two security mechanisms protect system integrity. If they've been disabled, it's often because someone wanted to bypass security protections — either for legitimate reasons (advanced development) or questionable ones.
SIP (System Integrity Protection):
csrutil status
- "System Integrity Protection status: enabled." → Normal, all good
- "System Integrity Protection status: disabled." → Disabled. Not necessarily a scam, but ask why.
Secure Boot: Go to Apple menu → About This Mac → System Report → Software → Boot Security. Should show "Full Security" on most modern Macs.
Check 7 — Crashes and System Stability
A Mac can seem perfect during a 10-minute test but have had dozens of crashes in recent weeks. This information is in the system logs.
How to verify:
Open Console.app (Applications → Utilities → Console). In the search bar, type "crash" and filter by the last 7 days. A healthy Mac has very few crashes — a few entries for third-party apps is normal. Dozens of system crashes or kernel panics means an unstable machine.
Or more simply: check the ClariMac report if the seller has one. The number of crashes from the last 7 days is displayed clearly.
Summary: Your Quick Checklist
Print it or keep it on your phone for the meetup:
- [ ] Serial number verified on checkcoverage.apple.com
- [ ] Activation Lock: Find My disabled, Mac with no linked Apple account
- [ ] MDM:
profiles status -type enrollment→ "No" - [ ] Battery: cycles < 500, health > 75%
- [ ] SSD: SMART Status = Verified
- [ ] Screen: no dead pixels, no image retention
- [ ] Camera: sharp image, no dead pixels
- [ ] Ports: all functional
- [ ] Keyboard: all keys respond
- [ ] SIP: enabled
- [ ] Crashes: rare or nonexistent in the last 7 days
If the Seller Has a ClariMac Report
Ask for the link. The report covers all the metrics on this list — battery, MDM, Activation Lock, SIP, Secure Boot, crashes, disk — on a single page you can consult before even making the trip.
A seller who provides a ClariMac report without being asked is a seller with nothing to hide. That's the strongest signal of good faith you can get on Kijiji or Facebook Marketplace.
What Getting It Wrong Costs You
A MacBook Pro M3 at $1,500 with a battery at 55%: $250 replacement. A Mac with corporate MDM that gets remotely wiped: $1,500 in the trash. A Mac with active Activation Lock you can't use: same.
These 15 minutes of verification are worth every second.
Selling a Mac and want to give buyers confidence from the first listing? Generate a ClariMac report in 5 minutes.