Mar 10, 2020 If it takes significantly longer, try to Repair Permissions using the system's Disk Utility, there might be a problem in the file system. Then run DaisyDisk again. With all due respect, Disk Inventory X is aged. It was last updated in 2005, and its scanning engine is much slower than DaisyDisk's. DaisyDisk's hidden space (if scanned as administrator) should be within 4-8GB limit for most Macs. If the numbers are larger, try repairing the volume as this may serve an indicator for file system errors. Taras Brizitsky, DaisyDisk's designer. DaisyDisk is a paid disk space analyzer for macOS. It displays a sunburst diagram of files on a hard drive to help with the location or deletion of large files. It can display previews of files using Quick Look.

Jan 22, 2016  Has your Mac lost some of it's pep? It's time to get it back with This Old iMac! In this installment, I show you how DaisyDisk can help you easily reclaim your precious hard drive space.

Mar 11, 2020

[Important update] DaisyDisk 4.10 adds support of APFS Snapshots

Ever since macOS Catalina was introduced, many Mac users noticed that their disks eventually get full without obvious reason. A quick scan in DaisyDisk typically reveals a big chunk of “hidden space“, which means the system is using more disk space than it’s possible to reveal by scanning, even with elevated permissions (scanning “as Administrator”).

The reason for this problem is that macOS is making temporary backups of the system, so called local snapshots, temporarily locking big amounts of disk space in an area of the disk that is fully opaque to the users. Eventually when the snapshots get transferred to the permanent storage, such as the Time Capsule, or as the snapshots become too old and get replaced by newer ones, macOS releases the disk space. However, the backup process is continuous and therefore there is always a certain amount of disk space that is locked by macOS for the snapshots.

This is how macOS Catalina works and it’s not supposed to even be a problem or require any maintenance from the user. However, in certain cases, you just need to free up the space urgently, and it’s quite confusing that you don’t have control over a big chunk of your disk.

Thankfully, the new version of DaisyDisk (4.10) is making it much easier to reveal the macOS’ hidden space, and for the part that cannot be revealed – understand its internal structure and even provide tools to reclaim it by demand.

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In particular, the new DaisyDisk cuts down the amount of hidden space by revealing some obscure system items such as non-linked content of the “firmlinked” Data volume (under /System/Volumes/Data), the virtual memory volume (under /private/var/VM) and some other.

Besides, DaisyDisk now shows a breakdown of the hidden space that includes the following items:

• Purgeable space. (You can also see it in Finder and Disk Utility when you inquire info for a disk). This is an amount of disk space, as calculated by macOS itself, which includes the snapshots too. You can forcedly purge this space by deleting it in DaisyDisk.
• [NEW] Snapshots. This is a list of the temporary snapshots, with their estimated sizes. You can forcedly delete any or all of them in DaisyDisk, with a simple drag-and-drop, as you’d do with regular files.
• Other volumes. This is the remainder of the system volumes that are used internally by macOS.

All in all, the new DaisyDisk is making a huge step to return you understanding and control of your disk on macOS Catalina, and probably provides the most exhaustive and informative view of your disk compared to any other disk utility.

The update is free of charge of the existing users. You can download it here. The full change log is here.

Local Snapshots

Local snapshots of Time Machine is a feature of macOS that serves as a temporary backup solution, until your Mac has a chance to connect to its permanent Time Machine disk, such as Time Capsule.

In macOS High Sierra, Time Machine stores snapshots on every APFS-formatted, all-flash storage device in your Mac or directly connected to your Mac. In earlier macOS versions, Time Machine stores snapshots on the internal startup disk of your Mac notebook computer and any Mac OS Extended (HFS Plus)-formatted storage devices directly connected to that computer.

The snapshots can take up a significant amount of disk space (up to 80% of the disk), This peculiarity often causes confusion to users, because it appears like the System category is taking too much spaceAdvent children complete english download torrent. on macOS High Sierra, in the About This Mac window.

On macOS High Sierra with APFS, the snapshots are located on your startup disk, but beyond any scannable area. DaisyDisk shows the snapshots as part of the purgeable space.

On older macOS versions, the local snapshots are located inside the restricted folder at /.MobileBackups. You can reveal its content by scanning as administrator. Note that DaisyDisk will still include the size of snapshots into the purgeable space.

It usually doesn’t make much sense to delete the snapshots, because just after you purge them, new snapshots will immediately begin to build up again. Instead, you can just let macOS take care of the snapshots automatically:

Snapshots older than 24 hours are automatically deleted. And to make sure that you have storage space when you need it, snapshots are stored only on disks that have plenty of free space. When storage space gets low, additional snapshots are deleted, starting with the oldest. That’s why Finder and Get Info windows don’t include local snapshots in their calculations of the storage space available on a disk.

However, in certain cases it may be desirable to forcedly delete the local snapshots. You can do it in DaisyDisk by dragging the purgeable space to the Collector, as you’d do with a normal file.

You can also use the command-line utility tmutil to manage the local snapshots manually.

Document Versions

Document versions is a related feature of macOS that keeps the history of revisions of documents that you create in certain applications. This history is stored in /.DocumentRevisions-V100 folder. If you delete this folder, you’ll not lose the documents, but all history of their editing may be lost. We generally don’t recommend deleting the document versions, unless you know what you’re doing.

Time Machine Volumes

A comprehensive Time Machine FAQ can be found here.

Even though DaisyDisk is able to scan Time Machine volumes, it does not allow you to remove any files from it. Apple does not welcome altering backups for a reason, and even in Finder you cannot make any modifications to your backups.

The only good way to delete anything from Time Machine backups without ruining them is using the Time Machine itself.

Never forget that by its nature the Time Machine will expand until it takes all space on its volume, so storing anything else on the same volume is not a good idea.

If you’re 100% sure you need to reduce Time Machine’s backup size by removing large files or folders from it, just follow the instruction below.

Scan the Time Machine volume. It usually takes 15 to 40 minutes depending on the way the disk is connected (USB, FireWire or Wi-Fi) and the number of stored backups.

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Unless absolutely necessary, do not scan Time Machine volumes as administrator, because it will likely take 3 or 4 times longer.

By their nature Time Machine backups contain lots of hard links which greatly reduce the disk space taken by backups while making each snapshot a complete copy of your system. DaisyDisk only counts the first encountered hard links and thus gives you a more accurate picture of how large each snapshot actually is.

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Once a candidate for exclusion from your backup is found, remember its name and backup date (backup folder names have YYYY-MM-DD prefixes, e.g. 2011-10-15-141532), launch the Time Machine from your /Applications folder and browse to the date. With the regarded folder selected, choose the Delete All Backups of Selected Folder command from the menu:

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That’s all. Don’t forget to configure the Time Machine to exclude the folders you don’t want to backup.