From the Tw Development web site:–
"The current version of TeXworks has been successfully built with
- Xcode (using gcc 4) on Mac OS X (built on 10.5, but should run on 10.4 or later)
- MinGW release 5.1.4 on Windows XP (also runs on Vista and Windows 7)
- gcc 4 on GNU/Linux, various BSDs, etc. "
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