I find Win10 runs better than 7 on the same hardware (Which in turn I think everyone agrees is snappier than Vista). I actually <i>don&#x27;t</i> think the latest iterations of OS X work so well on older hardware. Upgraded a 2011&#x27; MBP to Yosemite and it was certainly a worse experience wise than upgrading my 2011 desktop from Win7 to Win10. So I guess it varies. The story of the above upgrade was of course that there was a hardware bottleneck (RAM) in the mac, which had only 2Gb, which proved way too little for Yosemite so required an update. The 2011 PC had 8GB so was fine of course. I think it&#x27;s perfectly fine for the newer OS X version to use more ram.