IMac constantly Freeze while watching Youtube or Flash-based clip

Hi everyone
It is really getting on my nerves every time that I was watching Youtube or Website using Flash, the machine crashes and crashes and crashes!!!!
I did the Hardware Test and it didn't find any problem with Hardware.
I used the installation DVD to repair Disk Permission also
Could anyone please please help me how to trouble-shoot this seem-to-be-permanent issue???
Thank you very much in advance.
James
P.S. My iMac was middle 2009, with Model identifier iMac9,1, SMC version 1.44f0

First do what whyisitsohard (HUH?) suggests. If that does not resolve the issue take a look at how much free space is available on your Hard drive. I would not recommend running Mac OS X with less than 10% free space remaining on your startup volume. The free space is used for hidden swap files that Mac OS X needs do to virtual memory, and for other temporary files used by the system. Once free space gets low, the remaining free space becomes more and more fragmented into small pieces. That makes it hard for Mac OS X to operate efficiently. This issue is most apparent when watching videos.

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Taking photos whenever I could of said crash, like so:
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I've got the exact same machine and I also had a graphics card issue.
When the Mac starts-up, the graphics card on the Intel processor does
all the initial work. If you get to the stage when you see your user accounts
you know that the graphics processing has been delegated to the on-board
dedicated graphics card.
If you do get to this stage and it holds steady, it's probably not the graphics
card that is causing the problem. When mine crashed, it also took out my
USB ports and I also had a corrupt hard drive! Don't judge a underlying
issue by it's apparent symptoms.
My problems started in September 2014. If you are in the UK, judging by the
£13, you have 6 years for your machine to function reasonably properly and
for the reseller directly (Apple indirectly) no fix any issues free of charge.
Apple does advertise it's 6 year liability to comply with the Sale Of Goods Act
which is unprecedented in the commercial world so five stars their! But your
legal contract is with the reseller. You are also entitled to any costs you
incurred like delivery of the machine.
I wrote to my reseller and they agreed without question. After signing some
papers to agree with the Apple part replacement program or something it's
been running as new.
If you haven't done so already, contact the re-seller and explain the problems
and show them the evidence you have. If that fails then you should be able to
take the machine to a Apple specialist for it to be diagnosed with all costs
covered by the Apple programme.

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hi,
my fan starts turning really fast - around 6000rpm - whenever i access a website like youtube which has flash content in it. why is this, and how can i solve it?
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If you had written down the fan RPM, %CPU usage of the top using processes, and the Video you are viewing, including the browser you are using, and then if your friends would do the same then you would have useful information that we could use to determine whether you have a software problem such as a runaway app or whether you have a hardware problem such as restricted airflow or a discontinuous heat sink. the software problem is fixable without sending your MacBook away. A hardware problem very likely is not. It would be very useful to know which it is.
Without these numbers everything is nothing but a guess. We know almost nothing. For instance, if their CPU percentage is the same as yours, and they are running the same apps and watching the same video BUT their fan speed and temperature both are lower than your then it suggests that your computer is not cooling as well as their when the load is the same. This means you have an airflow restriction OR a poorly functioning heat sink on the CPU or other chip.
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Message was edited by: Gregory Mcintire

IMac constantly Freeze while watching Youtube or Flash-based clip

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