Photoshop Elements 12 for MacOS, the serial number provided shows as invalid when installing Photoshop Elements 12. The suggestion to run in demo mode for 30 days was at best temporary. This issue was discussed 24 SEP 13, is there a resolution yet? I am still unable to register my software!
Follow-up: I was able to successfully activate PE12 (Mac) after receiving a new serial number. One issue noted with this version is to insure you download the correct version either Win/Mac. Previous releases (PSE10/11) included both versions of the software.