This feature checks the file system for errors and attempts to correct them, all without much intervention from you. 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.

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