how to make maps larger than 20×20 mega tiles on the Mac ?
CC2 supports only 19×19 mega tile maps, CCEdit can create maps from scratch up to 20×20 mega tiles large. But it can edit existing larger maps, if you reserve enough memory for CCEdit in the Finder (MacOS 9.2.2 and prior or Classic environment of MacOS X). Tested by me with RtB maps of original size (40×40 mega tiles) with 64 MB RAM reserved for CCEdit (and 384 MB RAM in the Mac). If you want to setup such a large map from scratch, you must create the map data file using my CloseCombat2Tools or a text editing program (SimpleText, Excel, TexEdit …), then you can load the data file into CCEdit. Or use my tool 5CC.