The procedure for arranging the data is not harmful to your HDD and aims to boost the computer’s performance. The only thing Apple recommends is to make a full backup of your data, format the hard drive. How to defragment mac computer Pc And while it is not advisable to turn to such extreme measures, defragmenting a hard drive disk is a safe procedure if, of course, performed accurately. HFS works like any other Unix/Linux system, so to do a full defrag you have to unmount the drive and that's why iDefrag has an option to create a boot disk so you can boot up with OS X and iDefrag in memory so the drive is unmounted and you can then do a full defrag of the drive. The macOS does not provide a tool for defragmenting the hard drive. The further comments that iDefrag can't do a full defrag is wrong. I noticed a couple of comments on here referencing iDefrag. If you don't defrag then no bootcamp and no Windows. If you want to use Bootcamp on a drive that's been in use for a while then you will have to defrag or format and restore from a backup, which places everything together at one end of the drive, allowing Windows to install on the other bit. Please, someone with a background in NTFS and FAT respond to this and detail better than I could.Ī HFS (OS X) system does the same thing, but it endeavours to keep file contents together, so a directory gets fragmented, but a file doesn't or so the theory goes. Step 1 Open the Disc Utility program, which is located in the 'Utilities' folder of your 'Applications' directory. A typical NTFS or FAT system "fragments" files by distributing contents around a drive.
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