Chimera for Mac OS X is available in X windows and native Aqua versions. We recommend the X windows version because of the many problems with the current port of the Aqua Tk window toolkit.
Chimera runs on Mac OS 10.3 (Panther), 10.4 (Tiger), and 10.5 (Leopard), but not on older versions of the Mac OS.
An X server must be installed and running for Chimera to start. We recommend Apple's X server (X11). It is reliable and provides hardware OpenGL acceleration. Version 1.0 of X11 comes with Mac OS 10.3 as an optional component (standard location /Applications/Utilities/X11) and is also available from the Apple Web site. For Mac OS 10.4, see below.
On Mac OS 10.4, Chimera version 1.2121 or later must be used.Chimera uses the X11 Window System. If you had X11 installed on OS X 10.3 and upgraded to Tiger, it should still be installed. If you bought a new Mac or did a fresh install of Tiger, X11 is not installed by default. To see if X11 is installed properly, try running X11.app in /Applications/Utilities. If the application is missing or does not run, you will need to install it by the following procedure:
On Mac OS 10.5, Chimera version 1.2468 or later must be used.Chimera uses the X11 Window System. If you had X11 installed on OS X 10.4 and upgraded to Leopard, it should still be installed. If you bought a new Mac with Leopard, X11 is installed by default. If you did a fresh install of Leopard, X11 is not installed by default — you will need to install it by the following procedure:
Note that if you have a one-button mouse, the X11 provided with Leopard does not have three-button emulation on by default, which will make it impossible to translate and scale structures with the mouse. To turn on three-button emulation, do this:
If you experience difficulty downloading the distribution, try this link as a simple test to see if the size of the Chimera distribution is causing problems. The link should download a small Python program to your computer. The only difference between this and the Chimera distribution download is the size of the file, so if the link works then something in your environment is blocking the downloading of very large files.
If this test download does not work, then something in your environment is blocking the download of any binary file (the download is sent using the http content type of "application/octet-stream").
You can try downloading the Chimera distribution to a different computer or from a different network that you are sure does not make use of a proxy web server.
To install Chimera, open the disk image file you downloaded. This will put the Chimera application on your desktop. This may have happened automatically when you downloaded.
If more than one person will be using Chimera, the Applications folder is a good place to put it. Moving it to that folder requires administrator privileges. If it is only for your use, putting it in your home Applications folder or leaving it on the desktop are reasonable choices.
To deinstall Chimera, drag it to the trash.
The usual method of starting Chimera is by double-clicking the icon. Chimera can also be started from the command line, with the following executable:
Chimera.app/Contents/MacOS/chimeraThe DISPLAY environment variable must be set and the X server must be running for Chimera to start. Starting Chimera (versions 1.2304 and newer) will automatically start the X server if it is not already running.
defaults write com.apple.x11 wm_ffm -bool trueThe default behavior of the Quartz window manager from the Apple X server 1.0 release is to require you to click on each window before you can type to it or press buttons. The wm_ffm setting only effects X applications, not Aqua applications, so it only has an effect when an X window currently is active and you move the mouse to another X window.
When you are using a native Mac application (not X windows) and then click on a menu within the Chimera window the mouse click does not bring up the menu. It just activates the Chimera window and another mouse click is needed to show the menu. To make this work with a single mouse click, use the Mac X server wm_click_through preference by typing the following command in a Mac Terminal window:
defaults write com.apple.x11 wm_click_through -bool trueNormally Mac OS swallows window-activating mouse events. This preference causes a window-activating mouse click on an X window to also be processed by the application.
defaults write com.apple.x11 enable_stereo -bool true
X11 must be restarted after any of these settings are changed. The settings are saved in your ~/Library/Preferences directory, so they will apply to future sessions. Reissuing the commands with false instead of true will restore the default preference settings.
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