To transfer data from the MacBook with a broken screen, use Target Disk Mode. Target Disk Mode allows your Mac with a broken screen to mount like an external hard drive on another Mac. Here's how to do it: 1. Power down your damaged Mac. 2. Connect your damaged Mac with the new healthy Mac using the appropriate USB or USB-C cable. 3. Start up your damaged Mac while holding down the T key. If all is well, your Mac with a broken display will appear as a mounted drive on the new Mac and you can access it in Finder.