Will not finish download software. update high sirrah
After install starts with bar 1/4 finish mac turns on and ask for passcode press passcode and won’t turn on
MacBook Air 13″, macOS 11.4
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Is Firmware Password Enabled ??
Or
https://support.apple.com/en-ca/HT204756
If you can't unlock your Mac
After you locate your Mac, you can unlock it by entering the passcode that you created when you locked it with Find My.
If you can't remember that passcode, you have three options:
- Sign in to iCloud.com/find, then select your Mac from the Devices menu. Select Unlock and follow the steps to verify your identity.
- Unlock your Mac from your iPhone, iPad, iPod touch, or Apple Watch using your device passcode.
- Take your Mac to an Apple Authorized Service Provider along with your proof of purchase.