I have a number of presentations in Keynote 5.3 (iWork 09) format. I've already tried the new version of Keynote and it is inferior and incompatible with my files. Have any of you installed Yosemite and tried the older version of Keynote on it? I'm particularly interested to hear from power users that utilize multimedia, custom builds, transitions, etc. I'm ready to make the jump to Yosemite, but not if all my presentations are going to be compromised. Thanks a bunch.