Disk Utility, as its name implies, is a utility for management of hard drive, CD/DVD and compressed image files. Most of its advanced features, such as partitioning, formatting, cloning, partition table management are intended for power users of the operating system, however, the utility may be useful for an average Mac user with its basic features as well. Download a copy of Disk Utility for a Mac with help from an expert who is proficient with all Apple products and able to provide OS/iOS instruction and troubleshooting in this free video clip. Disk Utility. Disk Utility is the name of a utility created by Apple for performing disk-related tasks in Mac OS X. These tasks include: the creation, conversion, compression. Disk space analyzer (Disk usage analysis software) is a free software utility for the visualization of disk space usage by getting the size for each folder (including subfolders) & files in folder or drive. Name yosemite.disk.utility.for.el.capitan.dmg Size 8.11 MB Created on 2015-12-02 06:05:41 Hash 7a925. Mac Torrent Download Torrents for Mac Apps, Games, Plugins.
OS X’s Disk Utility—which enables you to format, partition, repair, and perform other kinds of maintenance on disks (including SSDs, flash drives, and disk images)—is good for what it does. Yet for many years conventional wisdom held that you also needed at least one third-party disk repair utility on hand to solve the problems Disk Utility couldn’t. Does that advice still make sense?
Disk utilities claim to be able to fix problems involving a volume’s directory, which keeps track of where all your files and folders are. (Directory damage, perhaps the most common type of disk error, can produce symptoms such as missing or inaccessible files, applications that won’t launch, and startup problems.) Most of these tools can also repair a partition map, which is a chunk of data that describes how data is to be stored on a disk; and many can repair certain kinds of errors with individual files, too (such as damaged preference files). Regardless of those details, when your disk is misbehaving, you probably don’t care if you have an invalid B-tree node size or an overlapped extent allocation; you just want the symptoms to go away.
I’ve personally had numerous disk problems that Disk Utility tried but failed to fix, displaying a scary error message that read: “Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.” On these occasions, I was grateful to have more powerful tools available. Many such disk-repair apps exist, but the big three are Alsoft’s DiskWarrior ($100), Prosoft Engineering’s Drive Genius ($99), and Micromat’s TechTool Pro ($100).
Apple has made ongoing hardware and software improvements that keep disks running happily more of the time.
Lately I’ve noticed something curious: While I used to turn to such utilities every few months, I haven’t had to do so in a long time—certainly not in the past couple of years. Anecdotal evidence suggests that I’m not alone in this; disk errors beyond the purview of Disk Utility seem to have declined sharply.
One reason is that Apple has made ongoing hardware and software improvements that keep disks running happily more of the time. OS X performs certain disk maintenance tasks automatically in the background—for example, it defragments smaller files on the fly, keeping all their segments contiguous on a hard disk so they’ll load faster. (Solid-state drives don’t require such defragging.) And, when you perform a safe boot (starting your Mac with the Shift key held down), OS X runs a more extensive set of diagnostic and repair procedures without you doing anything else. I credit these and other improvements to OS X with the reduced frequency of disk errors. In addition, Disk Utility has gained a number of new features in recent years, and it can now repair faults that might once have been out of its reach.
Whatever the reasons, I can tell you that my personal copies of DiskWarrior, Drive Genius, and TechTool Pro are all now several versions out of date, something I once would have found inconceivable. I’m asking myself, “Should I bother paying for upgrades? Will I ever even use them?”
If you find yourself asking similar questions, I have two answers for you.
No! Disk utilities are a waste!
As I look over the feature lists of the major disk utilities, I find it striking that they all advertise capabilities that Disk Utility already offers for free. The three third-party programs can check a drive’s SMART (self-monitoring, analysis, and reporting technology) status, repair disk permissions, and repair at least some types of volume corruption. Drive Genius and TechTool Pro can create a bootable duplicate of your disk and securely erase free space, and Drive Genius can also initialize and format drives. But Disk Utility does all that, too.
Disk repair always requires you to start up from a separate volume. But as long as your Mac is running Lion or Mountain Lion, you don’t need a second drive; simply restart while holding -R to use OS X Recovery, which boots your Mac from a hidden partition (or, in some cases, over the Internet) so you can run Disk Utility. The third-party utilities, by contrast, ship on bootable DVDs—except that they can’t boot the newest Mac models (not even if you use an external SuperDrive, for Mac models that lack an internal one). So in order to repair your startup disk, you’ll need to create a separate boot volume with the disk utility installed. (TechTool Pro’s eDrive is the sole exception here, behaving much like OS X’s Recovery HD.)
So, for most repairs, OS X’s native tools seem to be at least equal to the competition. And even if you encounter an error Disk Utility can’t fix, you don’t necessarily need to buy another app. Thanks to Time Machine, Disk Utility’s Restore feature, and a host of third-party backup programs, more Mac users than ever have great backups. In many cases, restoring a misbehaving disk from a backup can be faster—not to mention less expensive—than trying to repair the disk with a third-party utility.
On the other hand…
Yes! Disk utilities are still important!
Less frequent though they may be, disk errors do still occur, even on the newest Macs running the latest version of OS X. Modern Macs are by no means immune to directory corruption and other disk problems. And however much Disk Utility may have improved, it’s clear that it can’t fix everything. So, it’s still fair to argue that a third-party utility remains good insurance.
However, perhaps a better argument is that each of these utilities offers features beyond conventional disk repair. Here’s what they can do:
DiskWarrior has always been pretty much a one-trick pony—but it’s a great trick. It rebuilds the hidden directories that keep track of where all your data is located (damaged directories being a prime cause of disk problems)—and does so in such a way as to make it (in my opinion) the best all-around solution to that class of problems. If I encountered a disk error tomorrow that Disk Utility couldn’t fix, I’d still reach for DiskWarrior first, just as I did ten years ago.
TechTool Pro can recover files that were accidentally deleted (as in, you inadvertently dragged them to the Trash and then chose Finder > Empty Trash, making them unrecoverable in the Finder). TechTool Pro can also back up your directory while the directory is healthy to make recovery easier if it gets damaged. TechTool does other things, too: It tests RAM and VRAM, helps you calibrate audio and video devices, defragments files and volumes beyond the optimization built into OS X, locates bad blocks on a disk, and monitors devices on your local network. And its eDrive feature sets aside a special bootable partition so you can repair your disk without needing a separate startup disk.
Drive Genius, like TechTool Pro, can find bad blocks and defragment files and volumes. It also offers several features the others don’t, such as locating and deleting large or duplicate files and other disk-hogging resources, editing the raw data on your disk (a dangerously geeky thing to do), repartitioning a disk without erasing it (Disk Utility can do this too, but in a much more limited way), and benchmarking a drive’s performance.
All three of these utilities can also check certain files (such as .plist files) for damage; and they can continuously monitor one or more indicators of disk health, to warn you of potential problems before they become serious.
Only you can say whether the extra features in apps like Drive Genius and TechTool Pro are worth the cost. As for me, I no longer feel I need all these utilities, but I’ll need a few more problem-free years under my belt before deciding I can give up DiskWarrior.
Disk Utility, a free application included with the Mac, is a multipurpose, easy-to-use tool for working with hard drives and drive images. Among other things, Disk Utility can erase, format, repair, and partition hard drives, as well as create RAID arrays. You can also use it to create a clone of any drive, including your startup drive.
Disk Utility always had a few changes made to it with each release of the Mac OS, but when Apple released OS X El Capitan, Disk Utility received a major makeover. Because of the extent of the changes to Disk Utility, we're presenting guides for both Macs using OS X Yosemite and earlier, and those using OS X El Capitan and later.
The first five items below cover using Disk Utility with OS X El Capitan and later, while the rest cover using Disk Utility with OS X Yosemite and earlier.
Repair Your Mac's Drives With Disk Utility's First Aid
Disk Utility's ability to repair disk issues underwent an overhaul with OS X El Capitan. The new Disk Utility app's First Aid feature can verify and repair drives connected to your Mac, but if your troubles are with the startup drive, you'll have to take a few extra steps.
Format a Mac's Drive Using Disk Utility
The version of Disk Utility that's included with OS X El Capitan and later versions of the Mac OS has been panned for removing capabilities and changing how certain features work.
When it comes to formatting a drive connected to your Mac, the basics remain the same.
Partition a Mac's Drive Using Disk Utility
Partitioning a drive into multiple volumes is still taken care of by Disk Utility, but there have been changes, including the use of a pie chart to visualize how a drive's partition table is divided up.
All in all, it’s a useful visual, though a bit different than the stacked column chart used in earlier versions of Disk Utility.
How to Resize a Mac Volume
Resizing a volume without losing data is still possible using Disk Utility, however, the process has undergone quite a few changes that can leave many users scratching their heads.
Use Disk Utility to Clone a Mac's Drive
Free Mac Disk Utility
Disk Utility has always had the capability to copy an entire disk and create a clone of the target volume. Disk Utility calls this process a Restore, and while the feature is still present, it too has undergone quite a few changes.
Format Your Hard Drive Using Disk Utility
Disk Utility’s main purpose is to erase and format a Mac’s hard drives. In this guide, you will learn how to erase a disk, how to choose different erase options to meet any security need, how to format a drive, including how to zero out data and test the drive during formatting, and finally, how to format or erase a startup drive.
Partition Your Hard Drive With Disk Utility
Disk Utility does more than just format a hard drive. You can also use Disk Utility to partition a drive into multiple volumes. Find out how with this guide. You will also learn the difference between hard drives, volumes, and partitions.
Add, Delete, and Resize Existing Volumes
The version of Disk Utility bundled with OS X 10.5 has a few notable new features, specifically, the ability to add, delete, and resize hard drive partitions without first erasing the hard drive. If you need a slightly larger partition, or you would like to split a partition into multiple partitions, you can do it with Disk Utility, without losing the data that’s currently stored on the drive.
Resizing volumes or adding new partitions with Disk Utility is fairly straightforward, but you need to be aware of the limitations of both options.
In this guide, we’ll look at resizing an existing volume, as well as creating and deleting partitions, in many cases without losing existing data.
Using Disk Utility to Repair Hard Drives and Disk Permissions
Disk Utility has the ability to repair many common problems that can cause your drive to perform poorly or exhibit errors. Disk Utility can also repair file and folder permission issues that the system may be experiencing. Repairing permissions is a safe undertaking and is often part of routine maintenance for your Mac.
Back Up Your Startup Disk
You have probably heard the admonition to back up your startup disk before performing any system updates. That's an excellent idea, and something I recommend often, but you may wonder just how to go about it.
The answer is any way you want, as long as you get it done. This guide will show you how to use Disk Utility to perform the backup. Disk Utility has two features that make it a good candidate for backing up a startup disk. First, it can produce a backup that is bootable, so you can use it as a startup disk in an emergency. And second, it's free. You already have it, because it's included with OS X.
Use Disk Utility to Create a RAID 0 (Striped) Array
RAID 0, also known as striped, is one of the many RAID levels supported by OS X and Disk Utility. RAID 0 lets you assign two or more disks as a striped set. Once you create the striped set, your Mac will see it as a single disk drive. But when your Mac writes data to the RAID 0 striped set, the data will be distributed across all of the drives that make up the set. Because each disk has less to do, it takes less time to write the data. The same is true when reading data; instead of a single disk having to seek out and then send a large block of data, multiple disks each stream their part of the data stream. As a result, RAID 0 striped sets can provide a dynamic increase in disk performance, resulting in faster OS X performance on your Mac.
Use Disk Utility to Create a RAID 1 (Mirror) Array
Download Disk Utility For Mac 10.4 11
RAID 1, also known as a mirror or mirroring, is one of the many RAID levels supported by OS X and Disk Utility. RAID 1 lets you assign two or more disks as a mirrored set. Once you create the mirrored set, your Mac will see it as a single disk drive. But when your Mac writes data to the mirrored set, it will duplicate the data across all members of the set. This ensures that your data is protected against loss if any hard drive in the RAID 1 set fails. In fact, as long as any single member of the set remains functional, your Mac will continue to operate normally and provide complete access to your data.
Use Disk Utility to Create a JBOD RAID Array
A JBOD RAID set or array, also known as a concatenated or spanning RAID, is one of the many RAID levels supported by OS X and Disk Utility.
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JBOD allows you to create a large virtual disk drive by concatenating two or more smaller drives together. The individual hard drives that make up a JBOD RAID can be of different sizes and manufacturers. The total size of the JBOD RAID is the combined total of all the individual drives in the set.