Unlock mac locked by find my mac

Thank you for those details, jeffro25.

It sounds as though you may have visited the website on an iPhone which would be why you saw Find My iPhone. The prompt to sign in to the Apple ID is a prompt asking for the Apple ID the iPhone is signed in to. When visiting the iCloud website and walking through the steps previously provided, you would want to do so from a computer.

Have a great day!

Hi jeffro25,

Thanks for connecting with us today. Having access to your devices are important. You'll want to make sure that you're entering the Apple ID and password that was used to set up your aunt's MacBook Air so that you can unlock her device. You can see more about this here: How to remove Activation Lock - Apple Support

Remove Activation Lock on the device

Follow the onscreen steps to enter the Apple ID and password you used to set up your device or your device passcode.

Learn how to find your Apple ID or reset your Apple ID password.

Remove Activation Lock on the web if a device is offline

1. Go to www.iCloud.com/find.

2. Sign in with your Apple ID and password.

3. At the top, click All Devices.

4. Select the device that you want to remove from iCloud.

5. Click Remove from Account.

When you go to the iCloud website, make sure that you choose the option to sign in with the different Apple ID.

Take care.

Thanks, jeffro25.

From here you might need to Contact Apple for support and service for additional assistance. If you have it, when you reach out it would be helpful if you have your original proof of purchase handy.

Take care.