If Penn State has the Academic version of the LabVIEW Developer suite, you should have a copy of the Mac version of LabVIEW. That can be installed using the same serial number as the Windows version.
If they do not have the academic version, you will need to get another (actually two if you develop on both laptops) license for the Mac version of LabVIEW.
As for
USB to RS-232, NI does make several of these devices. I’ve never had a problem with them. There are several other companies that make them as well, but I have not used any others, so I cannot comment on them.
Ed