Adobe no longer supports macOS 10.11 (El Capitan). To see the list of supported macOS versions, see Photoshop system requirements.
Adobe has discovered the compatibility issues listed below with running Photoshop CC 2015 with macOS 10.11 (El Capitan).
We recommend that customers do their own testing on a non-production partition to ensure that new operating systems work with their current hardware and drivers.
If you do encounter issues not already documented, feel free to report them on our feedback site.
There are known delays in drawing that affect various areas of the application including:
We have created a plug-in as a temporary workaround for this issue.
Install the OSXCompatibility plug-in:
Download the OSXCompatibility plug-in package (v 1.0.11):
After you download the OSXCompatibility plug-in package file above, double-click it to decompress it. If asked, extract all the files.
Copy the OSXCompatibility.plugin to the Plug-ins folder inside the Photoshop application folder:
Applications/Adobe Photoshop [Photoshop_version]/Plug-ins
Our engineering team is working with Apple to correct the root problem as soon as possible.
When running Image Size command, the preview in the Image Size dialog turns black or the document turns black after you commit the the command.
Update Mac OS X to 10.11.1.