Apple has expanded its Self Service Repair Store to include parts and tools for all M4 Macs in the U.S. and several European countries.Users of M4 Macs can now perform self-repairs instead of relying on Apple or an Authorized Service Provider.The Self Service Repair Store offers a range of replacement parts and tools, including batteries, displays, and flex cables.Apple advises that most customers should still visit a certified repair provider for the safest and most reliable service.