Update. I decided to partition my internal drive and build another Mac OS X Snow Leopard for testing. I wanted to rule out any software conflicts that may have been causing my QGIS to crash on symbology changes
Re-installed Williams's great Framework dependancies and tested his builds of QGIS with shapefile data from Natural Earth. - I noticed that if I TURNED OFF the selections for: - Make lines appear less jagged at the expense of some drawing performance - Fix problems with incorrectly filled polygons - Under PREFRENCES/ >OPTIONS window< / RENDERING tab / Rendering quality The statistical occurrence of QGIS crashing while changing a layers symbology drops ~50% to 1 in every 4 symbology changes. The next question, (if I am the only Mac OS X user having these issues), is if there is some sort of hardware issue? I ran an the extensive Apple Hardware Test and came up clean.. I'll attach a Hardware Overview FYI. *Hardware Overview:* Model Name: iMac Model Identifier: iMac8,1 Processor Name: Intel Core 2 Duo Processor Speed: 3.06 GHz Number Of Processors: 1 Total Number Of Cores: 2 L2 Cache: 6 MB Memory: 4 GB Bus Speed: 1.07 GHz Boot ROM Version: IM81.00C1.B00 SMC Version (system): 1.30f1 *NVIDIA GeForce 8800 GS:* Chipset Model: NVIDIA GeForce 8800 GS Type: GPU Bus: PCIe PCIe Lane Width: x16 VRAM (Total): 512 MB Vendor: NVIDIA (0x10de) Device ID: 0x0609 Revision ID: 0x00a2 ROM Revision: 3234 * Displays:* *iMac:* Resolution: 1920 x 1200 Pixel Depth: 32-Bit Color (ARGB8888) Main Display: Yes Mirror: Off Online: Yes Built-In: Yes *Cinema HD:* Resolution: 1920 x 1200 Pixel Depth: 32-Bit Color (ARGB8888) Mirror: Off Online: Yes Rotation: Supported
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