Moving from Win to Mac

I am developing in Win10, have a functioning prototype tested on Android devices and have now learned, that I need a Mac to be able to test on an iOS device.
1) Can I install Stencyl on a Mac on my exisiting license without additional cost?
2) Can I copy the Workspace folder from the PC to the Mac and test from the Mac?
Thanks.

1) Can I install Stencyl on a Mac on my exisiting license without additional cost?

From the pricing FAQ:

You may install and use Stencyl on any computers you own. You may share a license with one other person, as long as you *both* publish from the same Apple Store/Google Play account. If you use separate accounts, you must buy licenses for each developer.

2) Can I copy the Workspace folder from the PC to the Mac and test from the Mac?

I'm not sure if the entire folder is transferrable, but games and engine extensions certainly are.

Thanks.

Just do an export of the game on Widows-side  and import on the macOS-side. Everything moves nicely between systems.

Sounds good. Thanks.