![]() Therefore, fragmentation can and still does occur and over time the problem just gets worse. The Mac performs defragmentation automatically, but only when specific conditions are met such as the files being a certain size. NovaBench measures your disk write speedsĪpple doesn’t actually recommend any specific defragmentation tools or even include any relevant utilities in Disk Utility. It’s an indispensable utility because it also measures memory speed, graphics and CPU performance. The Blackmagic Speed Test application NovaBenchĭetails: Mac App Store, NovaBench websiteNovaBench comprises a whole suite of performance benchmarks that includes drive write speeds. ![]() Blackmagic Disk Speed Testĭetails: Mac App StoreThe Blackmagic app is a very simple utility which shows read/write speeds in MB/second, as well as a whole host of statistics indicating whether your disk is suitable for high speed video. Two free apps available in the Mac App Store are as follows. The most convenient way to benchmark your disk speed is to download an application that measures raw read/write speeds. ![]() It’s also interesting to perform the same tests on a regular hard disk and an SSD, because the difference can be quite staggering. It’s useful to know how fast your Mac’s disk really is, in order to compare it with others and also to check whether it’s performing consistently over time. If you booted to the Lion Recovery HD choose Disk Utility from the Mac OS X Utilities screen, followed by Repair Disk in the normal wayĬhoose Disk Utility from the Mac’s boot screen
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