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This How-To article offers a simpler alternative.
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That’s not as hard as it sounds, but it’s a radical and fairly time-consuming solution. Even die-hard Apple fans will admit that Macs typically run new OS X versions better (faster, and with fewer bugs) if you start with a clean slate: completely wipe your hard drive, do a fresh install of the latest OS X release, and restore only the files you need. I’ve devoted several columns to hardware solutions - replacing old hard drives with fast new SSDs, adding more RAM, and increasing storage capacity using an external drive - but there are software solutions, too.
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“My Mac used to be fast, but now it’s running so slow.” I’ve heard many versions of this complaint, and they’re always factually true, not just opinions: Macs do become sluggish over time, even if all of their chips and hard drives are working like new.
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