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Begin by deleting the entire preferences folder:
Then start the application.
If that doesn't work, then we need a lot more information to help you:
thanks a lot for your service and the fast answer but i try and it was the same like before. Here my info's... Hope that will be helpful. It's an hackintosh computer but I'd always worked with Ae on this comp. I never had any problems like this and it still came's only after the12.2 update i think. not sure.... I'm cc member since a whyle and i have the student abo.
Model Name: Mac Pro
Model Type: Early 2008
Model Identifier: MacPro3,1
Board Identifier: Mac-F42C88C8
Processor Name: Intel Core i7 CPU 920
Processor Model: Harpertown
Processor Speed: 3.2 GHz
Number of Processors: 1
Total Number of Cores: 4
Memory Size: 24 GB 1280 MHz DDR3
Graphics Model: AMD Radeon HD 6xxx 1024 MB
Assembled in: United States
Manufactured during: June 2008
L1 Cache: 64 KB
L2 Cache: 256 KB (per Core)
L3 Cache: 8 MB
Processor Bitrate: 64 bit
EFI Bitrate: 64 bit
Kernel Bitrate: 64 bit
Processor Interconnect Speed: 5.8 GT/s
Boot ROM Version: MultiBeast.tonymacx86.com
System SMC Version: 1.30f3
Power Source: AC Power.
Hardware Universal Unique Identifier: 7F47AAF4-E8DB-5916-B95C-70DD3AE58CAC
Minimum Supported Operating System: OS X 10.5.1 Build 9B2117 (Leopard)
Current Boot Operating System: OS X 10.9.2 Build 13C1021 (Mavericks)
Maximum Supported Operating System: Latest version of OS X 10.9 (Mavericks)
So i found some other problems and mybe thats the same source... Cinema 4D Lite doesn't start also. On the MAXON website i found that exist some troubles with ATI graphic chips under Mac OS X
A hackintosh is not a supported system for After Effects.
I have this computer since 3 years and i worked all the time with after effects and the other adobe programms. I've paid for the software and i use a regular intel based computer....