![]() ![]() ![]() Note that the Seal on the unmounted read-only System volume is normally broken, but it’s the snapshot which is the important one: that should be sealed, unless you have broken its seal intentionally.Īpple’s terminology for the SSV isn’t entirely consistent. VM, containing virtual memory caches, which is upwards of 20 KB depending on use.Recovery, the Recovery Volume, of around 1.1 GB.Preboot, a small volume of around 714 MB. ![]() On Intel Macs, this is given its full name the writable Data volume, by default on the internal disk named Macintosh HD – Data, which is normally hidden from view at /System/Volumes and accessed via firmlinks.The snapshot is named -update- followed by its UUID, and the volume (hence its snapshot) is typically about 15 GB in size the SSV, a mounted snapshot of the unmounted read-only System volume named Macintosh HD, which forms the root of the boot file system.There’s the traditional hidden EFI partition, and a single APFS container with the bootable system, consisting of: Volume layout on Intel Macs hasn’t changed since Big Sur. For example, a Preboot volume shown here as having an identifier of disk7s3 could be anything from disk7s1 to disk7s7 instead, and when in the container disk3 would be anything from disk3s1 to disk3s7. Throughout these diagrams, Unix-style identifiers are only examples of what you might see, and are flexible in use. To review those of earlier versions of macOS, see this article.Īlthough the changes between Big Sur and Monterey may seem minor, they’re particularly significant in determining which Recovery volume is used, as explained here. This article summarises the volume layouts used in Monterey 12.1. If you have a Windows PC, this guide can help you accomplish the same thing in Windows.The last few major releases of macOS have brought structural changes to the layout of boot disks, and M1 series Macs are quite different from Intel models. If you right-click on any of the files and choose Reveal in Finder, a Finder window will open and display the file in question.As you can see in the screenshot below, the largest of the neon-green blocks was the iMovie App. You can also discover the identity of large files by clicking on a “block” in the main window.As illustrated in that screenshot, Virtual Disk Image files were the kind that take up the most space on my Mac. To sort the file types by size, click the Size column in the side panel (see screenshot below).When the scan has completed you’ll be presented with the ‘results’ window and its side panel.Depending on the size of your drive, the number of files on it, and its speed, it can take a few minutes for Disk Inventory X to finish its examination.A series of permission windows will appear.The app will explain what it’s about to do.Select the drive you want to examine, and then click Open Volume. dmg for Disk Inventory X if it’s still active) will be displayed. Each of your currently mounted drives (including the.Then launch it from your Applications folder. Head over to the Disk Inventory X home page and download and install the App.Plus, it’s completely free and works in macOS Catalina (and earlier). It’s super easy to use and hands down the most effective way to recover disk space in macOS. Then you can decide what you want to delete or move to another drive in order to free up disk space. Using the fantastic Disk Inventory X App, you can scan your hard drive(s) and you’ll be presented with a detailed, easy to read list of all the files on your drive – sorted by file type and size. This guide will take you step by step through the process of figuring out which files are taking up so much disk space on your macOS computer (so that you can recover it) using completely free and open source software. ![]()
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