Here's a status report on the port of Chimera to the native Mac OS X windowing system Aqua. I have an Aqua Chimera built that can make it through some hand testing showing molecules with different representations and surfaces and show volume data and use some basic user interfaces like side view and model panel and preferences. It also passes all the tests in the Chimera test suite. More testing will be needed to see if everything is working. Showing side view and 1gcn and switching to sphere causes system crash with Radeon 9000. This makes the side view unusable with the Radeon 9000. This crash also occurs on the X windows Mac Chimera. I've reported it to Apple. It does not occur on Eric's GeForce2 MX. To get Tix working I commented out a number of X windows calls and used the standard unix build. Most of this code was #ifdef'ed out for Windows so it should not effect Chimera operation. The one case that is likely to cause problems is an XSetClipRegion() call I commented out. That could cause drawing to run outside the intended bounds. So the Tix port problem looks less severe than I reported before. There are a bunch of Aqua Tk problems. Mouse button 2 and button 3 are exchanged. They are correct in X windows Mac Chimera. Benchmark dialog scrollbar mapped and unmapped continuously when dialog opened. This can disable your whole Mac windowing environment. Sideview multi-tab window keeps OpenGL sideview display on top even when another tab is selected. Mabye a Togl problem. Iconifying main window does not iconify other windows. Pop-up window showing function call arguments in Idle takes focus. Also atom spec popups and toolbar buttons showing popups take focus so button clicks don't go to the desired place. Usually 2 or 3 button clicks works around this. "Data" check button in volume dialog puts "Dat" and "a" on separate lines. Side view "show low res" option menu shows "Fa..." and "T..." instead of False and True. In both cases there is enough space so there is no need for the abbreviations. Clicking on the Idle window puts its menu at the top of the Mac screen. To access the main Chimera menus, need to click on the main graphics window to get them at the top of the Mac screen. Splash screen does not update to show progress messages. It just shows a blank white window until just before it disappears. Tear off menus are in upper left corner of screen under top of screen menu making it impossible to move them. Chimera icon is a separate window. tkwin.wait_visibility() is used by Chimera in splash screen and tkgui.py code and never returns. I commented those out. Requesting multisampling pixel format for side view produces a pixel format but then fails to create graphics context with a bad pixel format error. Need some special case Mac code to work around that bug. I'll try to package up an Aqua Chimera early next week for Eric and Conrad to try on their machines. (I'm working from home tomorrow). Tom