Yosemite OSX crashes frequently

Question

i just upgraded to Yosemite OS and it crashes frequently showing the screen of death with white background and many languages text.
This happens in different actions :
when i plug hard disk
unplug a hard disk (knowing that i eject it safely)
waking up the laptop
switching between spaces
connecting Android device
sometimes i crashes suddenly without any specific action
Device information:
Last update : Yosemite OS X 10.10.1
MacBook Pro (15-inch, Mid 2010)
Processor: 2.4 GHz Intel Core i5
Memory: 4 GB 1067 MHz DDR3
Graphics: NVIDIA GeForce GT 330M 256 MB
Any advice how to fix this or why it happens?
knowing that the OS X Mountain lion & OS X mavericks never crashed.

Answer 1

Hi RV,
The famous 2010 MBP with that discrete Graphic Chipset. I have one of those as well, and if I want to test compatibility, I test it on that, not on one of the other Macs. If it runs on this, chances are better than 80% that it will run on the others.
Firstly you have to ensure that you have Backups. That means more than one very recently, made with different backup methodologies or programs like Carbon Copy Cloner, Time Machine or Super Duper.
Secondly, you have to ensure that your Mac is clean. And I mean very, very clean from crapware and malware. You can follow the manual steps as outlined here, or follow the AdwareMedic route. Thomas_r has written some very nice stuff on his site The Safe Mac which you can read. Follow the instructions specific to your Mac.
Thirdly, there is a nice utility which you can use to have some view/control over the automatic switching for your Mac, called gfxCardStatus. In another post I will deal with what is happening, in Engineering terms if you are interested. More important is a solution, or interim solution.
Have fun
Leo