Since the days of Mac OS X “Panther” (which shipped in 2003), Mac OS X and its successor macOS have used something called Hot File Adaptive Clustering (HFC) to automatically defragment files. Why Macs Usually Don’t Need to be Defragged The result? Faster loading of apps and data.

This slows down operation.ĭefragmentation reads the files on the HDD platters, then rewrites them on the platters so single files are written contiguously and the drive head doesn’t need to move back and forth as much. As a result, those files are stored in locations all over the drive platters and the moving read/write head must travel the complete width of the platter to load files. Data can’t automatically migrate itself to the outer edges of the platters to fill in available space, so after many read/write cycles have been completed, there are gaps where large files cannot be written. New data is generally written to the outside of the platters, with the read/write heads moving in toward the center as more data is stored. HDDs use a magnetic read/write head to access rotating round platters that usually spin at either 5,400 or 7,200 revolutions per minute (see image above right). In this article, we’ll discuss why defragging Mac HDDs is usually unnecessary and how to do it if you’re one of the few users who may actually benefit from the process.ĭefragging is a slang term for “defragmentation”, which is the process of organizing files on a HDD to optimize how it accesses those files. Like all computers, Macs tend to slow down a bit after a few years of usage, and those readers who are new to the Mac might think that the old Windows solution of “defragging the hard disk drive” (HDD) might help. Double-click on Activity Monitor to open the tool.Macs are more popular than ever, thanks to a “halo effect” from buyers of iPhones and iPads who decide to make the switch from Windows to macOS.Select Applications on the left menu and then click on Utilities on the right pane.But keep in mind that some of the things there should be left alone, so if you aren't sure what it is, it's probably best to keep it open. To close those out, simply right-click the app and then select Quit.Īlternatively, if you want to use a triage approach, your Mac's Activity Monitor is a good way to figure out what's using the most memory or CPU. Open apps appear in the bottom toolbar of your screen with a small dot just below the app's icon.

Solution: Close apps and tabs that you aren't using. In reality, however, that much activity may be the reason your computer isn't as quick as it used to be. In a perfect world, we'd browse the internet while listening to Spotify, working on documents, scanning for viruses and video conferencing with friends at the same time. Try to quit out of programs you're not using.

How do i defrag my mac