Apple is reportedly using a new diagnostic software to repair MacBook Pro and iMac Pro models, which if not used to repair or replace parts, will render the system inoperable. Motherboard ,which was updated by Apple itself, reports that the new change affects third-party Mac repair shops.

From what it seems, with this new change, without the special software, third‑party Apple product repair services will not be able to fix issues related to the motherboard, the display, the keyboard, the touchpad and the touch ID. For iMac Pro, if the storage or the motherboard is replaced without using the new software, on the next boot the message “inoperative system” or “incomplete repair” will appear. The system will not be able to operate unless approved by a certified technician with the new program, Apple Service Toolkit 2.
According to Apple, this change is for security reasons. Apple chips are responsible for critical functions such as disk encryption. Especially now that hardware security seems to be a hot topic in the news, such a policy from the company is expected. On the other hand, it is not the most common tactic, as something like this would never happen on devices from other companies.
Many are those who do not agree with this change, and claim that the company deliberately makes the repair process of its devices more expensive and difficult, indirectly forcing its customers to buy new devices long before it is necessary.
