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I presume you know what is in your machine. Click on the Apple in the upper left corner and About this Mac. Check to see that the amount of RAM you have installed and its correct speed is recognized (or if there are any other configuration issues). If these are incorrect Photoshop and plug-ins may not run at all.
Better collaboration with Libraries Manage distribution of read-only Creative Cloud Libraries so they can be used by team members, but not changed or deleted.Updated Libraries panel Find the assets you need faster with new filtered search of the Adobe Stock and icons that make it easy to identify licensed Stock assets.Selection and Masking Space This new dedicated workspace helps you make precise selections and masks more easily than ever. Use tools like Refine Edge Brush to cleanly separate foreground and background elements.Everyday tasks, accelerated Photoshop CC opens documents faster and delivers greater responsiveness.