When trying to open Photoshop CS5.1 on my iMac with newly installed Yosemite this message pops up: "To open CS5.1 you need to install the legacy Java SE6 runtime." I have gone to the website it gave as a link which was Apple.Inc and downloaded javaforosx.dmg. then started the 'Install' but on reaching the HD to select stage my iMac HD is greyed out and my Backup HD is the only one I can select for the download. Any suggestions to install what seems to be required? (No I am not prepared to start a subscription to Adobe for the Creative Cloud version).
Panic over! I Repaired Permissions on the iMac HD then tried the Install of javaforosx.dmg again which this time selected the iMac HD. Photoshop now up and running with Yosemite. Also updated Lightroom 5 to v6 successfully.
Roy Rainford 