Keynote 15.2.1 crashing when opening older files
Why is opening a keynote file from 14 crashing the newest keynote? What to do?
Opening a Keynote file from 2014 (Keynote 6.x) in the newest Keynote version often causes a crash due to obsolete media codecs, legacy QuickTime dependencies, or missing deprecated structural metadata that the modern app fails to convert gracefully during the automatic upgrade process.