He chose a version of Unix instead (and added an "x" to Mac OS) and all Macs since have relied on it.

作为替代，他选择了Unix的一个版本(在MacOS后添加了一个“x”)，从那时开始，所有的苹果电脑都基于这个系统。

youdao

Also, if augmented parameter declarations were added in a future version beyond Tiger, we'd have to ensure that these augmented declarations would be compatible with existing compiled generic classes.

另外，如果在Tiger以后的版本中添加扩充的参数声明，那么我们必须确保这些扩充的声明将与现有的已编译泛型类兼容。

youdao

Also, if augmented parameter declarations were added in a future version beyond Tiger, we'd have to ensure that these augmented declarations would be compatible with existing compiled generic classes.

另外，如果在Tiger以后的版本中添加扩充的参数声明，那么我们必须确保这些扩充的声明将与现有的已编译泛型类兼容。

youdao