When a client’s vintage MacBook or iMac requires testing, it is connected to the local network via Ethernet.
The "30" in the version number is that points to a specific, minor revision or patch of version 1.5.3. This was a common practice for internal Apple software, tracking updates for bug fixes and compatibility. Apple Service Toolkit - 1.5.3 30
For independent repair shops, the "30" suffix in "Apple Service Toolkit - 1.5.3 30" is a stark reminder of the ongoing battle for repair rights in the Apple ecosystem. When a client’s vintage MacBook or iMac requires