M1 的 Mac 以后系统降级。。。真的能行得通么

• 資深大佬 : geniussoft

  封闭和构架没关系的，想做的话，T2 芯片就能做了。

• 資深大佬 : wmwgijol28

  要做 apple 早就做了..

• 資深大佬 : wunonglin

  为毛要降级？

• 資深大佬 : Veyan

  Mac 为啥需要越狱…架构和开放与否也没啥关系吧

• 資深大佬 : bookit

  官方文档说，关闭 sip 可以安装其他操作系统了。

  比如 arm 版的 linux，不过没法给 SOC 写驱动，m1 的那么多专用电路就浪费了

• 資深大佬 : lp10

  > So, what are the security modes? In full security mode, new Apple Silicon Macs enjoy the same best-in-class security technologies that exist on iPhone. This mode is enabled by default. In addition, you can now boot from external disk without downgrading the security of the system. We think this is great.
  > By contrast, reduced security provides flexibility and configurability of your Mac, and it keeps the Mac what it is.
  Reduced security allows you to run any version of macOS, including the versions that are no longer signed by Apple. > In addition, users that want to install notarized kernel extensions must enable this mode in order to do so.
  > To enable reduced security, users must authenticate in macOS Recovery first.
  <https://developer.apple.com/videos/play/wwdc2020/10686/?time=1078>

• 資深大佬 : lp10

  也就是以后需要手动调低安全级别到 reduced security 才可以安装旧版 macOS （早于 Big Sur 的 macOS 是肯定跑不起来啦）以及使用内核插件，但不是完全不可能。

• 資深大佬 : hakono

  mac 越狱？
  mac 本身就开放了 root 权限啊没必要啊，至于 lz 担心的收紧权限就是杞人忧天了，mac 作为一个 pc 的操作系统，不给用户管理员权限修改系统，一堆工具怎么用