Your MacBook Air Won’t Start
Few problems are as frustrating as a MacBook Air that can’t get on its feet. Here are some ideas for troubleshooting this most vexing problem:
Check your connections. If MacBook Air won’t even turn on (and the power cord isn’t connected), the battery is probably drained. Connect the power cord and try powering up. If MacBook Air still won’t start, make sure the power cord is properly connected at both ends. The LED on the connector that plugs into MacBook Air should be either green (indicating that the battery is fully charged) or amber (indicating that the battery is charging). Also, if the power cord is plugged in to a power bar or surge protector, make sure that device is turned on. If the device has a reset switch, press that switch.
Remove all nonessential devices. Disconnect everything from MacBook Air. If it starts successfully, one of the disconnected devices is likely the culprit. Reconnect the devices one at a time, restarting each one after you connect it. If after connecting one of the devices MacBook Air refuses to start, that last device is the problem.
Try a Safe Mode boot and then restart. One of the things a Safe Mode boot (described in ...
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