I'm running Photoshop CC 14.1.1 on MacOSX 10.8.4 and I have the following problem:
The functionality 'Export for web' doesn't work and also it's not possible to open .png files. Does anyone know what this might cause? I've tried to delete the preferences 'Adobe Photoshop CC Settings' but that didn't seem to work.
Sounds like you've moved the app, or moved the required plugins folder.
The program is located in the default Applications folder. I don't think the plugins folder is moved, but just to be sure: can I search for the required plugin by name and move it to the right folder?
It belongs in the Required folder -- plugins is just for third party plugins.
And the name of the plugin is SaveForWeb.