Main Window resizing is working without crashes on my iMac now, although the "Maximize at Startup" checkbox remains checked no matter what I do to it. What I did different was to uninstall it, then rename the *Library | PixInsight | PixInsight64.plist* file to PinInsight64_old.plist, then reinstalled PI 1.8 RC3 for OSX 64-bit. I guess some setting from the older 1.7.xx version was somehow interfering?
When checking the PixInsight64.plist file mentioned above, about half way down you find the Global.Preferences.MainWindow settings. Three settings I was watching were:
<key>000.Global.Preferences.MainWindow.FullScreenAtStartup</key>
<false/>
<key>000.Global.Preferences.MainWindow.MaximizeAtStartup</key>
<false/>
<key>000.Global.Preferences.MainWindow.ShowSplashAtStartup</key>
<true/>
The MaximizeAtStartup setting shows <false/> as expected, once the window has been resized. But the *Global | Preferences* "Maximize at Startup" checkbox remains checked no matter what.
Further towards the bottom of the PixInsight64.plist file, you find the MainWindow.Geometry settings. The settings I was watching were:
<key>000.MainWindow.Geometry.DesktopHeight</key>
<integer>1440</integer>
<key>000.MainWindow.Geometry.DesktopWidth</key>
<integer>2560</integer>
<key>000.MainWindow.Geometry.FullScreen</key>
<false/>
<key>000.MainWindow.Geometry.Height</key>
<integer>1136</integer>
<key>000.MainWindow.Geometry.Left</key>
<integer>97</integer>
<key>000.MainWindow.Geometry.Maximized</key>
<false/>
<key>000.MainWindow.Geometry.PrimaryScreenHeight</key>
<integer>1330</integer>
<key>000.MainWindow.Geometry.PrimaryScreenWidth</key>
<integer>2560</integer>
<key>000.MainWindow.Geometry.Top</key>
<integer>22</integer>
<key>000.MainWindow.Geometry.Width</key>
<integer>1824</integer>
Unlike the Windows settings documented previously, which changed with each start/stop cycle, the OSX app settings stayed the same through several cycles.
If I start PI and put a checkmark in the Global | Preferences "Maximize at Startup" checkbox, then click the "Global Apply" ball, then quit PI, the Global.Preferences.MainWindow.MaximizeAtStartup setting changes to <true/>, while the MainWindow.Geometry.Maximized setting remains set to <false/>. When I restart PI again, PI comes up maximized as expected, but the two settings don't change. When I quit PI, THEN the MainWindow.Geometry.Maximized setting is changed to <true/>.
So there's still a minor bug in the OSX 64-bit RC3 version, that keep re-checking the Maximize at Startup checkbox regardless of the app's own plist settings. But at least it doesn't crash.
![smile :)](http://pixinsight.com/forum/Smileys/default/smile.gif)
Rod