Robert Delius Royar writes: Don't know. It invariably takes me months to recover fully from a Mac OS X upgrade, so I avoid new versions until absolutely necessary (or it comes installed on a new machine). XEmacs has never been a problem, though. Since XEmacs itself is a single-threaded TTY/X11 application on Mac OS X, I expect that any issues will be due to "feature libraries" (such as image libraries), that can be worked around by not configuring that feature. I've been using stock Apple GCC on all OS X versions from Panther to Snow Leopard, and more recently MacPorts GCC 4.2, 4.3 and 4.4 and clang 3.1 on Leopard, and MacPorts GCC 4.4 and clang 3.1 on Snow Leopard with no particular problem. I've also seen various reports (and MacPorts patches) to deal with Lion issues, but AFAIK these aren't going to particularly affect XEmacs. _______________________________________________ XEmacs-Beta mailing list XEmacs-Beta(a)xemacs.org http://lists.xemacs.org/mailman/listinfo/xemacs-beta