The problem was that my mac pro failed to "software update", and whatever .dmg files downloaded from internet failed to mount, always gave "codec overrun" error. Moreover, some images from web pages couldn't display properly, either some colors were lost, or the image file couldn't display at all, because there was an error opening or downloading the file.
I first thought this problem was caused by some hardware problem, because my mac pro had been badly treated by me. But it wasn't. Because I tried reinstalling the whole system, and for some reasons it worked for like 5 or 6 days then this problem occurred again. So it's not because of the hardware.
Then I found this very interesting discussion, it's about the same issue I had, so I checked it out, and figured this problem should be caused by the network settings.
So first I disabled Internet Sharing, and now I can finally mount those .dmg files! Of course I re-downloaded them, because Disk Utility verified it as "corrupted". I was using iGetter all the time.
But then the images still couldn't display properly. At this time, my network also had a printer, an Airport (as a bridge), a PC, and a MBP (that worked fine), and lastly a Linksys router w/ 4-port switch. I figured maybe these "non-computer" machines were causing problems. So I unplugged their internet cables. And the problem is solved!
Something really important here, even the above solution worked for me, it probably wouldn't work in another situation...But, the point is, I don't think this problem is caused by any part of the hardware in my mac pro.
I first thought this problem was caused by some hardware problem, because my mac pro had been badly treated by me. But it wasn't. Because I tried reinstalling the whole system, and for some reasons it worked for like 5 or 6 days then this problem occurred again. So it's not because of the hardware.
Then I found this very interesting discussion, it's about the same issue I had, so I checked it out, and figured this problem should be caused by the network settings.
So first I disabled Internet Sharing, and now I can finally mount those .dmg files! Of course I re-downloaded them, because Disk Utility verified it as "corrupted". I was using iGetter all the time.
But then the images still couldn't display properly. At this time, my network also had a printer, an Airport (as a bridge), a PC, and a MBP (that worked fine), and lastly a Linksys router w/ 4-port switch. I figured maybe these "non-computer" machines were causing problems. So I unplugged their internet cables. And the problem is solved!
Something really important here, even the above solution worked for me, it probably wouldn't work in another situation...But, the point is, I don't think this problem is caused by any part of the hardware in my mac pro.
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