Yes you need 2 program. You don't have to use the Live version.
For your personal return you can use either the Online Premium or buy any of the Desktop CD/Download programs for Windows or Mac. All the personal Desktop programs have the same forms, you get more help in the higher versions.
You can start an Online return here,
https://turbotax.intuit.com/personal-taxes/online
You can buy the personal Desktop CD/Download program now here,
https://turbotax.intuit.com/personal-taxes/cd-download
For the S corp you will need to use Turbo Tax Business.
TT Business is not available to do online or on a Mac. You can buy the Windows Desktop Business program here,
SEE UPDATED POST BELOW
Window System Requirements
https://ttlc.intuit.com/community/system-requirements/help/minimum-system-requirements-for-turbotax-...
