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    Opera DMG installation media corrupt

    Opera for Mac
    7
    9
    2643
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    • mcandre
      mcandre last edited by

      When I download Opera for Mac, the DMG fails to open, with Reason: Not recognized. I tried redownloading the DMG, but I still get the same error. Anyone else experience this?

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      • mcandre
        mcandre last edited by

        Update: Today, the Mac DMG download is no longer corrupt, yay.

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        • daniel
          daniel last edited by

          The few times this happens, it is usually a problem with a interrupted download (quitting before download finishes or router dropping packages). I’m glad you were able to resolve it.

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          • akerbeltzalba
            akerbeltzalba last edited by

            I'm having the same problem on a MacBook Air, 3 days in a row I have retried the download but always get the same message. How can you provide corrupt downloads???

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            • A Former User
              A Former User last edited by

              They are not corrupt. If the problem really persists, you may be loosing packets due to faulty network equipement.

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              • jjmcewan
                jjmcewan last edited by

                I'm seeing this issue as well. Tried numerous times, tried numerous builds. I'm having a problem believing it's downloaded data corruption for each and every one of those download attempts and only for this particular website.

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                • akerbeltzalba
                  akerbeltzalba last edited by

                  Sorry aeyoun but this doesn't wash. I do not have this problem with other downloads - and just to make sure, I even tried several at the same time and Opera is the only one which has this error. So if I'm loosing packets, it's down to something you're doing, not me because if my network equipment IS faulty, then it should be faulty in all cases. Not just the Opera download.

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                  • lanbrown
                    lanbrown last edited by

                    Originally posted by aeyoun:

                    They are not corrupt. If the problem really persists, you may be loosing packets due to faulty network equipement.

                    Dropped packets are normal, an excessive amount is a different story. Since packets are expected to be dropped and TCP will try to use as much bandwidth as possible (up until the window size) it uses a drop as a way to see if there is congestion. TCP does not know the transfer rate allowed, so it will just send more and more data until a drop is observed and thus will back off. It will try to go higher again though and when a drop is observed, back off again. This is standard TCP behavior and also why it is considered reliable is that any dropped packets can be resent. Why do you think TCP has ack's and sequence numbers whereas UDP does not? TCP is fully capable of recovering from dropped packets.

                    Some reading for you:
                    RFC 675
                    RFC 793
                    RFC 1122
                    RFC 2581
                    RFC 5681

                    So you better check your network as you will have drops as well.

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                    • herold-kai
                      herold-kai last edited by

                      Please always tell us about used version of Opera and OS. Also report if PowerPC (PPC) processor is used! THX

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