Here is a place that has several versions of the RTS Software:
http://trainweb.org/seaboard/layouts.htm
Check out the following at the Apple Store for info regarding running PC apps on the Mac:
http://store.apple.com/us/question/answers/mac/how-can-i-run-pc-programs-on-a-mac/Q9A9UDJKJ9427X7CK
Dante
For the last fourtenn years or so, I used the Atlas RTS software (too many versions to remember) to design and modify my layout. I also played with it to create some small layout plans. Last month, I bought an iMac to replace my old PC. I still have the RTS files but can't read them, less print them.
Is there any software I can use on the iMac that can read and use RTS files?
Guy
Modeling CNR in the 50's