PokerTracker

w/ the same aliases on the same site? I was using my PC laptop for a good part of last year for poker until the HD died. Then I found out PT4 was out for Mac and never looked back. I'm pretty sure that has at least a thousand tournaments in HH's, notes and stats and it'd be nice to have.

If you have the original hand history and summary files just import those to your new database using Get Hands From Disk.
If not, export everything from your old database and import those files.

So importing everything from my PC database will combine the 2 automatically? I just want to make sure I don't overwrite the existing Mac database with the PC database.

Yes - that's the only way to combine data. Any hands already in your database will be ignored (and reported as duplicates).

Thank you sir.