Hi Katheryne, I certainly understand your concern, However, I would like to bring a couple if things to your kind notice. Yosemite has not been officially launched by apple, it is a beta version. Latest version of Mac supported by adobe is "Mac Os 10.9.4" and we are still testing our products on Mac OS 10.10(Yosemite) As of now CS 5 is end of life for testing on latest version OS. However, you can still try to load CS 5 on Yosemite, if that works, it would be an unexpected behavior. Unfortunately we would not be able to provide support for Os X Yosemite(10.10) unless it is officially launched. For more info please refer : Mac OS X Yosemite (10.10) compatibility | Creative Cloud Thanks, Atul Saini
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