Please explain the issue in detail as to when exactly does your Premiere Pro(PPro) crash and on which OS?
Do you get any error message before crash or perform any specific workflow after which PPro CS6 crashes?
Make sure your graphic drivers and Premiere Pro CS6 are up-to-date. If not, update them and check.
Attach the crash logs for futher research.
[Moved the discussion to Premiere Pro forum]
Premier crashes after briefly seeing the splash screen
Model Name: Mac mini OS X10.8.3
Model Identifier: Macmini5,3
Processor Name: Intel Core i7
Processor Speed: 2 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 6 MB
Memory: 8 GB
Intel HD Graphics 3000:
Chipset Model: Intel HD Graphics 3000
VRAM (Total): 512 MB
Process: Adobe Premiere Pro CS6 
Path: /Applications/Adobe Premiere Pro CS6/Adobe Premiere Pro CS6.app/Contents/MacOS/Adobe Premiere Pro CS6
Version: 6.0.0 (6.0.0)
Code Type: X86-64 (Native)
Parent Process: launchd 
User ID: 501
Date/Time: 2013-04-03 18:52:16.439 +1100
OS Version: Mac OS X 10.8.3 (12D78)
Report Version: 10
Interval Since Last Report: 8554 sec
Crashes Since Last Report: 1
Per-App Interval Since Last Report: 6 sec
Per-App Crashes Since Last Report: 1
Anonymous UUID: A4EAF5EE-3AC3-F070-F95F-2F3588A9B24B
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000000
Please send the crash log to http://forums.adobe.com/people/Arpit%20Kapoor via PM. Posting an entire crash log in the discussion makes it unreadable for everyone else. I've kept some relevant details that can be understood by most people. The rest of the log is only useful to software engineers, which most users aren't. Thanks!