Apple recently internally documented a new data recovery process for Macs that uses the T2 chip introduced with the iMac Pro and the 2018 MacBook Pro. The new process for repair workers is being introduced due to the advanced security features of the T2 chip, including hardware encryption for SSD storage that is not compatible with previous Apple data recovery methods used on older machines.
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Apple notes that the data transfer process for Mac & # 39; s with the T2 chip will be used when its repair employees are presented with a machine from a customer who needs a PCB installation and when the PCB is "partially functional". The process also requires that the system can be switched on.
To complete the process, Apple's repair staff will use a Thunderbolt (USB-C) to Thunderbolt 3 (USB-C) or Thunderbolt 3 (USB-C) to USB-A cable and another host computer, as well as an external hard disk where the data is transferred. From there, the machines can be put into DFU mode and the data recovery process can be started from Apple's internal diagnostic tool.
The previous MacBook Pro data recovery tool from Apple before T2
Although the Apple tool takes about 10-20 minutes to partition the external hard drive, Apple notes that the data transfer depends on the amount of data and can take up to two days.
When Apple introduced the 2018 MacBook Pro, some users noticed that the machine was down after Apple removed a special SSD connector that was used on the previous-generation MacBook Pro for data recovery by staff on the device's non-removable SSD . That change was actually made because Apple introduced the T2 chip to the machine – it needed a new data recovery process and so the connector was not needed.
Although the new T2 chip offers a number of security features, including on-the-fly encryption (which prevents the SSD from being removed when it is removed from the machine), it also offers many other new features of the new MacBook Pro and iMac Pro. The new security features have provided protection, especially for Mac users, against potential security problems in the real world. Last week they reported that "almost all" Mac and Windows laptops and desktops were at risk due to data theft, with the exception of Macs that used the new T2 chip.