Jing SWF files CANNOT be edited by Camtasia for Mac (the SWF files created in Jing can only be opened within Camtasia Studio Windows).
Snagit (version 10 and below on Windows) AVI videos can not be directly imported by Camtasia for Mac and you would need to convert it to a different format and/or codec (such as QuickTime movie or mp4) on the original Windows computer.
Snagit for Windows 11 or greater/ Snagit for Mac 2 or greater create mp4 video captures. Those mp4 files can be directly imported into a Camtasia for Mac project.
Camtasia Studio Recordings (.camrec) and Project (.camproj) files cannot be transferred over directly to Camtasia for Mac. If you are using Camtasia Studio (Windows) 8.3.0 or greater, the Recording files (.trec) are editable within Camtasia for Mac.
Please see this document for information on working with Camtasia Studio files in Camtasia for Mac.