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Comment by emsy | Hacker News Reader

Coming from Yosemite, you should clean you Mac with petrol. But seriously, Yosemite was such a mess, it felt like an old Windows installation where formatting is the only way to regain a decent performance. I'm glad I made a clean install with the GM 2 weeks ago. The system is way better than Yosemite (but still far from being as stable as Mountain Lion)

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Sounds like cargo cult.

Whatever problems Yosemite had, they weren't caused because of "file accretion", nor would they remain after the OS is updated (as if it somehow reads old problematic files and goes back to its old buggy ways).

(That said, I had zero problems as a heavy dev+audio/video user of Yosemite, and zero too after updating to El Capitan GM -- with the exception of Cubase and NI audio units not working in Logic).

Wait, feeling that this update is better is OK, but I don't really understand how formatting could improve thing is such a significant way.

perception is reality. I've no doubt there are cases that upgrade in place doesnt work as well as fresh install, but I am skeptical that there is dramatic demonstrable differences between the two most of the time.

For yosemite, I have a macbook pro that came with the OS and another macbook pro (nearly identical) upgraded from mavericks. No significant differences. I don't see why it should be like that this time and I would love to read a technical explanation.

I believe it's likely more a benefit of clearing out the cruft that has accumulated over time rather than problems with the update itself. A lot of stuff gets installed over the years, and upgrading in place keeps the majority of that in place. Doing a fresh install and putting back only what you're currently using will probably result in fewer programs, daemons, drivers, etc that the system has to deal with.

Basically this. Yosemite was just such a very poor user experience.

Where do I download the petrol app?

I think that's an idiom.

It is! The Mac was just so very buggy and unstable with Yosemite.

arco.com , exxon.com , shell.com , chevron.com will give you local downloading locations.

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