Keynote 6.6 cannot open old file, says: " cannot be opened for some reason." I've found that Keynote after upgrading to 6.6 could not open some of my previously created presentations anymore. How do I revert to a previous version?
Apple released Keynote 6.6.1 today - I tried to open previous files before and after updating, and sure enough, the files that previously would not open in 6.6 actually opened in 6.6.1.