Grace and David talk about what happens when an operating system is so old, macOS doesn't know how to migrate from it. And some other stuff.macOS version history - Wikipedia (https://en.wikipedia.org/wiki/MacOS_version_history)Year 2038 problem - Wikipedia (https://en.wikipedia.org/wiki/Year_2038_problem)File Allocation Table - Wikipedia (https://en.wikipedia.org/wiki/File_Allocation_Table#FAT32)Accidental Tech Podcast (https://atp.fm/)The rapid testing show : Planet Money (https://www.npr.org/transcripts/1073227859)