1、启动至恢复系统：按住 Command 和 R 键的同时重新启动 Mac。
2、从“恢复”菜单栏中选取“实用工具”>“终端”
3、终端”窗口显示后，从菜单栏中选取“Shell”，然后选取“新建窗口”以打开第二个“终端”窗口。
4、在第一个“终端”窗口中，键入以下命令：diskutil cs list应会显示类似以下内容的列表：-bash-3.2# diskutil cs listCoreStorag髫潋啜缅e logical volume groups (1 found)|+-- Logical Volume Group 9BDE693D-8B2A-4BB5-B2F2-AB836127C4FA 【UUID 号】 ========================================================= Name: Macintosh HD Sequence: 1 Free Space: 0 B (0 B) | +-< Physical Volume AA2E2185-84C9-4D41-95DB-13235D3BBC8F | ---------------------------------------------------- | Index: 0 | Disk: disk0s6 | Status: Online | Size: 29743423488 B (29.7 GB) | +-> Logical Volume Family 00C419B1-BA2B-4234-8480-6955349B2AF3 ---------------------------------------------------------- Sequence: 8 Encryption Status: Locked Encryption Type: AES-XTS Encryption Context: Present Conversion Status: Complete Has Encrypted Extents: Yes Conversion Direction: -none- | +-> Logical Volume 081502ED-C76D-4F4B-8641-6B0B3AD1512B --------------------------------------------------- Disk: -none- Status: Locked Sequence: 4 Size (Total): 29424652288 B (29.4 GB) Size (Converted): -none- Revertible: Yes (unlock and decryption required) LV Name: Macintosh HD Content Hint: Apple_HFS记下第一行中的逻辑宗卷组 UUID 号。【一般在第三行】
5、在第二个“终端”窗口中，键入以下命令：diskutil cs delete LVG UUID注：将“LVG UUID”替换为您在上一步中记下的编号。例如：diskutil cs delete 9BDE693D-8B2A-4BB5-B2F2-AB836127C4FA
6、删除命令完成后，会出现另一个命令提示符。
7、选取“终端”>“退出”以返回“恢复”菜单。
8、选取“重新安装 OS X”。