I will say this first, Track Designer was released in 2007 so it may not be as up to date as some of the other track designer software. Regardless, here is another option for those of you running Macs.
A slot track designer for the Scalextric slot car racing system featuring sport and classic track libraries, color coded lane options, bridge creation, and many other editing features to assist your slot car track layout needs. If you need additional track pieces for your new layout, check out our Scalextric Track page.
This unregistered version is fully functional but has a 30 track piece limitation built in. Whether you can still register the software is unknown at this time. The PayPal “Pay Now” button is available on the official site. Registration is $30.
Cost: Free Trial with 30 PC Limit/$30 Registered
Slot Track Supported: Scalextric Sport & Classic
Current Version: 1.3.1
Official Site: https://www.scideas.net/Software/TrackDesigner.htm