In a new WWDC session video today, Apple explained the system architecture of the upcoming Apple Silicon Mac transition. In particular, this will mean some changes to the experience, including a new macOS recovery options screen, as well as disabling the target disk mode.
Currently, you can access a variety of macOS recovery functions at startup, but each requires a different key combination. As detailed by Jason Snell in Six colors, you can hold down Command-R for recovery mode, or clear NVRAM by holding down Option – Command – P – R. However, starting with Apple’s silicon Macs, Apple is simplifying this process.
In a WWDC session titled “Explore the new Apple Silicon Macs system architecture,” Apple explained that you will be able to access macOS recovery options simply by pressing the power button when you start your Mac. As you can see from the image of Above, this will present a screen that will allow you to access additional macOS recovery options, start normally, shutdown and restart.
Apple also says that Apple Silicon Macs will deprecate target disk mode and replace it with Mac sharing mode. This means that instead of turning your Mac into an external hard drive, Share mode will make it a resource SMB network file share that allows you to access data after authentication.
Six colors It also points out new security options:
These Macs will also have a little more granularity when it comes to boot security. Each boot volume can be configured in a different security mode, either full security (which is the default) or reduced security. This means that external disks can be booted without degrading security.
In reduced security mode, you can launch any supported version of macOS, even if Apple no longer signs it. And if a trusted app or accessory uses a third-party kernel extension to enable the functionality, you should use this mode.
Finally, Apple Silicon Macs will include a new system recovery area that offers a basic version of macOS with support for reinstalling macOS and macOS recovery. You can view the entire WWDC session on this topic through the Apple Developer Website.
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