swmbojnr got a MacBook Pro for Christmas which was immediately updated to Yosemite and everything seems fine. swmbo, on the other hand has a 4 year old MacBook Pro and the update has caused the system to run much slower. I think, just like other computers, that the latest version of the OS is fine with the latest version of the computer (faster processor, more RAM, faster disk, etc.) but is often not so good with older systems.

Peter

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