Stellar Drive Defrag

Systematize the fragmented data on Mac drives.
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Awards: Mac Informer Editor Rating 4
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Perform defragmentation to increase the integrity of drives in your Mac and free additional space. Analyze the current volumes and partitions, then reorganize them to avoid fragmentation, preserving the entirety of data and the original file locations.

Stellar Drive Defrag, defrags Mac hard drive, organizes free space, and thus optimizes Mac’s performance. This tool even works on boot volume by creating Mac bootable DVD. Some of the very efficient features of this tool are defragmentation of Mac files i.e. the tool collects all logically related pieces of scattered file and locates them at nearby locations and hence reduces fragments of that file. Moreover, this tool facilitates you to either defrag single or multiple files simultaneously. You can also optimize the free space available on your hard drive and thus keep all the free space at one place to avoid fragmentations. This certainly reduces the disk head movement and thus increases the performance of your Mac. Some other features of this software are it performs full defragmentation on your hard drive. The tool very accurately determines the complete space allocation on your hard drive and then effectively defrags everything present on the drive such as files, metadata, and all unused space. This tool categorizes the space of the hard disk through various attributes including allocation, fragmented data, unused space, and overflow. This reliable software also defrags all metadata files present in your system such as catalog, attribute files, extent overflow, and allocation. Through Quick Defragment option of the software, you can defrag all fragmented files on your Mac volume. Therefore, this option eliminates the need of full defragmentation of Mac hard drive or volume. The option to create Mac bootable DVD lets you defrag even the boot volume of your Mac. However, if you are using Lion, then you need to download the bootable image (.dmgk file) and then burn it on a DVD to defrag the bootable partition of Mountain Lion. To analyze this software, you can download its free demo version. The demo version of the software shows the allocation of free space on various levels and displays the files of selected volume.Stellar Drive Defrag is a handy Mac application that helps you optimize your system by searching for pieces of fragmented data and organizing them in an efficient manner. This defragmentation tool can prove to be quite useful, especially if you have recently installed and uninstalled multiple programs and noticed a decrease in the performance of your system.

In order to start optimizing your system, the first thing you will need to do, after launching Stellar Drive Defrag, is to select the source volume. Once the analysis is completed (might take some time), you can either choose to display a layout of the data and quickly perform a full or a quick defragmentation, optimize your volume or defragment the metadata.

By switching to the "Files" view, the application allows you to select specific files to defragment along with their associated metadata for an easier and smoother data access.

If you are worried that your drive will reach a critical temperature during the defragmentation process, yon can rest assured, because Stellar Drive Defrag comes with a reliable monitoring tool that will instantly pause the process the moment the disk temperature reaches the specified limit. This way, your hard disk will have the necessary time to cool off so that you can safely resume the defragmentation process.

Summing it all up, if you are ever in need of a powerful and easy-to-use Mac application that will help you optimize and defragment your files and volumes, then you should give Stellar Drive Defrag a try.

TV Senior editor
Tyler Vidd
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Review summary


  • Supports file defragmentation
  • Built-in disk temperature monitor
  • Intuitive and friendly interface


  • Can only defragment one volume at a time

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rating Jennifer Nordstrom
This was exactly the same thing that happened to me! I have not called to ask for a refund but I will be unless I am able to reach someone in technical that can help resolve this issue! Very non-user friendly. So honestly I cannot even rate how it works since I have not been able to get it work yet.

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I tried this on my iMac Mountain Lion and it was a disaster. User Manual was blank, buttons to continue each process were missing and had to create a boot disk which was a nightmare. Asked for the promised refund and this was their reply:
"We would like to inform you that we cannot consider your refund request as according to our refund policy, a refund can only be processed in case, if we are not able to provide you any support or if there is any bug found in our software."

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