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If you plan to use this as a workaround, you may find this snippet of code useful: Module[{nb = EvaluationNotebook[]}, NotebookFind[nb, "Output", All, CellStyle, AutoScroll -> False]; FrontEndTokenExecute[nb, "SelectionConvert",...
The installation method of dragging the application icon into the Applications folder is a standard and widely recognized method of installing applications on Mac OS X. It is the same method used to install Mathematica.
Are you able to consistently reproduce the inverted graphics colors and subsequent crash with the notebook you attached? If so, how long does it take after launching Mathematica before the bug manifests itself? The crash report you posted indicates...