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invalid checksum

2375 Views 3 Replies Latest reply: Mar 17, 2013 9:16 PM by Mike Johnson12 RSS
kfungal Calculating status...
Currently Being Moderated
Nov 18, 2012 1:12 PM

What does "invalid checksum" mean

  • Limnos Level 8 Level 8 (36,585 points)
    Currently Being Moderated
    Nov 18, 2012 1:52 PM (in response to kfungal)

    Checksums are used to verify a file you have on your computer is identical to the one on the server.  Invalid checksum may indicate a corrupt download, or in much less common cases a file has been tampered with.  Try another download.

  • nikond100 Calculating status...
    Currently Being Moderated
    Mar 17, 2013 10:12 AM (in response to Limnos)

    Hi.. I know this conversation closed many months ago but I am having the same problem. I have just turned on one of my Macbooks and it indicated via the MacStore that I needed the recent update of IOSX software. Currently I am running 10.8.2... and it showed that I needed the new update of 10.8.3

    I clicked on the download button and after download it came back with a message to say the file had been corrupted during download. I tried to download it again via the App Store but it then said that there are no current updates or all updates are current. I checked to make sure that the existing software had not updated and it had not. So I went to the Apple webpage where you are able to download files directly from the site.

    I then tried to download the 10.8.3 combo software... After about 35 mins I tried to install it from the Download file

    After validating the file which is normal.. It cam back with an error - "Invalid Checksum" So I deleted the file from downloads and tried again.... Same thing...

    I then tried to download the smaller update file (the one below in the image) - Less time to download but came back with the same error.

    So in short I am unable to download this update... I am getting the same error message "Invalid Checksum" when I use either the AppStore or the main Apple software update page on the web..


    Anyone suggest anything? I have tried to download this a couple of times now and am getting the same results.

    Appreciate any help or advise.


    Screen Shot 2013-03-17 at 17.03.11.png

  • Mike Johnson12 Level 5 Level 5 (6,300 points)
    Currently Being Moderated
    Mar 17, 2013 9:16 PM (in response to nikond100)

    Start a new topic/post to get a good answer that is dedicated to your issue.




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