I will be doing a migration of my older IMAC
to my new IMAC here at work.  Do I need to
uninstall Sibelius and Virtual Drumline or
can I just migrate everything over to the
new computer? 

Hey Neal,

I don't have a surefire response for you on this, but here are a few thoughts.

Generally, the migration should work okay. It's not my preferred method because I like to start fresh on a new system, but that also turns into a pretty major task to reinstall tons of software and utilities, so yeah...migration may be necessary if you don't have the time to spare.

If you do migrate, your license activations will break. So at the very least, expect to re-authorize a handful of programs. I know Sibelius will require you to do this (using AvidLicenseControl), and the VDL Library will as well (using Native Instruments Service Center).

In either case, I would recommend you DE-activate those products on your old machine before doing the migration (and any other programs that require activation). That may prevent a few hassles down the road.

Good luck, and congrats on the new machine!