MAC常见五国及解决办法 开机按 F8 用 -v -s 进入后，键入以下命令，重建权限 /sbin/fsck -fy /sbin/mount -uw / chmod -R 755 mach_kernel chown -R root:wheel mach_kernel chmod -R 755 /System/Library/Extensions/ chown -R root:wheel /System/Library/Extensions/ rm -rf /System/Library/Cac