Initialize an SSD in OS X® El Capitan and Later
Before you can use your new SSD with your Mac® system, or install macOS® onto it, you have to initialize and partition it first. Follow the steps in this article if you are using OS X El Capitan or later. If you have not upgraded, follow our guide for earlier versions of OS X.
- If you are adding a drive to an existing setup, connect the SSD using a USB adapter or other external connection method and enter Disk Utility, or install the SSD internally into your system and enter Disk Utility via the OS X Recovery tool or your installation media. When the SSD is noticed by the Mac computer, you will see a message telling you that the drive cannot be read by this computer. In this message, click the Initialize button.
- The Crucial SSD will be listed in Disk Utility. Highlight the SSD and click the Erase button.
Note:
- In macOS High Sierra, we have had reports of the new SSD not appearing for initialization and erasing/partitioning.
- The new default for Disk Utility Show Only Volumes (a formatted partition of a drive) as seen below keeps the SSD from being seen. Toggling this to Show All Devices using the dropdown in the upper-left of the utility will expose the drive.
- After this has been done, the displayed list of disks does not automatically refresh. The easiest way to force a refresh is to close and reopen Disk Utility from your Utilities.
3. 新しいパーティションに付ける任意の名前を入力し、パーティションが[GUIDパーティションテーブル]に設定されていることを確認します。
4. フォーマットのデフォルト値として"[Mac OS拡張（ジャーナリング）]"が選択されていることを確認します。
5. [消去]を選びます。これでパーティション分割とフォーマットが終わりました。
6. ディスクユーティリティでの操作が終わったら画面を閉じます。
これで、SSDは名付けた名前でデスクトップ上、およびOS Xインストーラを実行している場合はドライブ選択メニューに表示されるようになりました。
SSDの実際の取り付けについてのご不明点は、交換用SSDの取り付けに関するこちらのガイドをご覧ください。
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