- FREE DISK SPACE MACBOOK OS X EL CAPITAN MAC OS X
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That should keep life simple, reliable, and stress-free.
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So for the moment, probably with Yosemite and certainly with El Capitan, you should keep ample drive space free, but not worry about defragmenting either files or free space.
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This is because of the way that the Recovery partition is implemented, and gets to be more of a problem if you are using a Fusion Drive. You will need a minimum hard disk space of about 2G to download and install the new Mac OS X El Capitan. The old trick of cloning your startup drive to an external disk, and cloning it back to the startup drive, is now fraught, and could leave you with a system which cannot boot from either drive. There are still some file defragmentation tools, but I would be wary of using them at present. The other side to this is that El Capitan is not as easy to defragment either. But it is more important to keep ample free space, so that OS X can do its housekeeping, and obtain the scratch file space it needs. Look at this screenshot from Disk Inventory X: The pink section surrounded by the yellow line is my old ‘iphoto’ library. I ran Disc Inventory X to see where the excess space was taken.
To run well a mac hard disk needs at least 20 free. Despite massive improvements in Windows 10, Apple’s OS X El Capitan is still the best consumer-level operating system on the planet, with more speed, convenience, and overall smoothness than ever before. I just noticed after El Capitan that I lost a lot of space. Is El Capitan the best Mac OS The Bottom Line.
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If you still start up from a normal hard drive, then there might be some benefits in periodic defragmentation. For a full list of hardware requirements, view the OS X Technical Specifications. If you use an SSD as your startup drive, or have a Fusion Drive, you definitely need not worry about file or free space fragmentation. You should never attempt to defragment files or free space on an SSD: that would be pointless, and would shorten its working life.
These have become progressively less important as OS X has become better at performing its own background housekeeping to minimise the fragmentation of files, and as SSDs have become more widely used. The theory behind defragmenting free space is to ensure that OS X and applications can obtain contiguous areas of free disk space for their scratch and working files, again to improve their speed of access. The theory behind defragmenting files is that reading from hard drives is quickest when the drive does not have to keep chasing fragments of the file which have become scattered to different parts of the drive. Do these still apply to El Capitan, and if so, how should I do them?Ī These are traditional housekeeping measures which were once considered to be very important to optimise performance in OS X and its applications. Q Others used to advise periodically defragmenting files on your startup drive, and you used to recommend defragmenting its free disk space.