You are looking at data files on an old mac, some of which are dated from 2/10/2010 and some others are dated from 2015.
That's about all we can tell you based on the very limited information you have provided... perhaps some more detail like the file names and/or file extensions and possible the folder names that they're in might make it a bit easier for us to tell you what it is that you're actually looking at
Alternatively... you can try reading this:
https://multibit.org/help/v0.5/help_troubleshooting.html and this:
https://multibit.org/help/v0.5/help_fileDescriptions.html
