Once you've written the new number you can reboot and enjoy full access to iCloud services again. Open 'About This Mac' If you can start up your Mac, click the Apple icon > About This Mac to quickly open your Mac overview. Make double, triple, and quadruple sure you enter the correct number as you will not get a second chance. Hold down Option once you hear the startup sound to get to a boot menu.īlank Board Serializer will now launch and prompt you to enter a new serial number for your board. This will overwrite the entire disk so make sure you get the disk number right here as well.Įnter your administrative password if prompted. Please type a Mac identifier or an iPod, iPhone, iPad, Apple TV or Apple Watch identifier into the above search box and click Lookup. Make sure not to enter the wrong number here.Įxecute sudo dd if=/path/to/BBS.dmg of=/dev/diskX bs=1m replacing the input path with the path to your downloaded Blank Board Serializer dmg and setting the correct disk number on your output path. Launch Terminal from your Applications > Utilities folder.Įnter the command diskutil list to see a list of the disks you have connected and identify the USB stick.Įnter diskutil unmountDisk diskX to unmount the disk, replacing X with the disk number of your USB stick. Note: You should be authorized by Apple to use this software. You may be able to get it from the Macintosh Repository. It could also be on your receipt or in your Apple account.ĭownload the Blank Board Serializer software. You can find your Mac's serial number on the box in came in. This is imperative as you only get one chance to enter a new serial number.

Locate the correct serial number for your Mac.

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