Updated to Mavericks: Now get following message for specific apps in Applications Folder: "you can't use this version of the application "DVD Player" with this version of OS X." It then lists the version of the app that I currently have. This has affected 16 Apps on my iMac. Some of them (Safari, Photo Booth) have updated version on my desktop that run. With all of the other affected apps, do I have to purchase updated versions? Also, how do I delete the non-functioning versions from my Applications folder?