how to access disk utility on mac startup

If a hard drive is acting up, Disk Utility’s First Aid function is the first thing you should try. RELATED: How, When, and Why to Repair Disk Permissions on Your Mac

One of them: volumes on the same drive pool storage space, meaning you’ll see two separate drives in Finder, but won’t have to manage how much storage space each volume uses. To add a new APFS volume, simply select your system drive, and then click Edit > Add APFS in the menu bar.

APFS is Apple’s new file system, the default on solid state drives as of macOS High Sierra, and it’s got all sorts of clever tricks up its sleeve. If you want to repartition your system drive, you’ll need to do this from within Recovery Mode, with one exception: APFS volumes. RELATED: APFS Explained: What You Need to Know About Apple's New File System Note: Many of these operations are destructive, so be sure you have backups first. You can also resize, delete, create, rename, and reformat partitions. You can adjust the partitioning layout scheme here. To manage your partitions, click a parent drive and select the “Partition” heading. Each “parent” drive is a separate physical drive, while each little drive icon below it is a partition on that drive. This annoyingly leaves out empty hard drives, but click Views > Show All Devices in the menu bar and you’ll see a tree of drives and their internal partitions. RELATED: How to Show Empty, Unformatted Drives in Disk Utility on macOS On the left side of the window you’ll see all mounted volumes. Partition Drives and Format Partitionsĭisk Utility shows internal drives and connected external drives (like USB drives), as well as special image files (DMG files) that you can mount and access as drives. This allows you to use Disk Utility to wipe your entire drive-or repartition it. In Recovery Mode, macOS runs a special sort of recovery environment.

How to access disk utility on mac startup