Get Seesmic Desktop 2 to Work on Mac OS X

Most people are having no problem installing Seesmic Desktop 2, but a small set of Mac OS X users are running into a common error. When they attempt to install the program from Seesmic’s website they are presented with the following error message: “Application can’t be installed.”

Here is how to fix the problem:

1. Microsoft Silverlight, not SD2, is the problem, so you’ll need to uninstall it first. Go to your Mac hard drive and then to “/Library/Internet Plug-Ins/” and delete “Silverlight.plugin”

2. Go to your home folder and then “~/Library/Application Support/Microsoft/” and delete the “Silverlight” folder. (thank you @dejunky for this tip)

3. If you have previously installed a beta version of SD2, go to your home folder and then to “~/Documents” and delete the “Seesmic” folder. (thank you @loic for this tip)

4. Now to reinstall Silverlight. Download the latest version from microsoft.com/getsilverlight and install it.

5. Close your browser and then reopen it.

6. Download SD2 Seesmic’s website.

It should now work. If you’re still having trouble, continue reading:

You may have some extra Silverlight files that were not deleted. Go to your Mac hard drive and do the following:

  • Go to “/Library/Internet Plug-Ins/” and delete “Silverlight.plugin”
  • Also in “/Library/Internet Plug-Ins/” delete “WPFe.plugin”
  • Go to “/Library/Receipts/” and delete “Silverlight.pkg”
  • Also in “/Library/Receipts/” delete “Silverlight_W2_MIX.pkg”
  • Also in “/Library/Receipts/” delete “WPFe.pkg”
  • Go to your home folder and then to “~/Library/Application Support/Microsoft/” and delete the “Silverlight” folder. (thank you @dejunky for this tip)

Don’t worry if some of these files don’t exist.

Alternatively paste the following code into Terminal and let it run:

rm -rf /Library/Internet\ Plug-Ins/Silverlight.plugin/ && rm -rf /Library/Internet\ Plug-Ins/WPFe.plugin && rm -rf /Library/Receipts/Silverlight.pkg/ && rm -rf /Library/Receipts/Silverlight_W2_MIX.pkg/ && rm -rf /Library/Receipts/WPFe.pkg/ && rm -rf ~/Library/Application Support/Microsoft/Silverlight

Repeat steps 2-4 above and it should work.

Edit: As evidenced by the comments, this isn’t as surefire a solution as I had hoped. They are, however the steps that I took and it worked for me, so it’s worth a try.

I’ve added a tip courtesy of @dejunky in the comments: Go to your home folder and then “~/Library/Application Support/Microsoft/” and delete the “Silverlight” folder before reinstalling Silverlight.

If you have any other solutions, please share them in the comments.

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  • OH! thanks for writing this workaround as we are investigating with Microsoft what the issue is. Will try it right now. You’re right, it’s few users but it’s annoying for them.

  • Anonymous

    Nope, doesn’t work for me. FYI, it goes all the way to the “Thanks for installing Seesmic Desktop 2 Beta!” screen, but clicking Start won’t do anything. When I close and reopen Seesmic, I just get a blank screen. This started with v2 Beta on my Macbook only. Working great on iMac.

  • Anonymous

    Try deleting SD2 completely (that is both the .app in the Applications folder and the “Seesmic” folder in Documents) and then reinstalling.

  • Anonymous

    Thanks for the pointer; unfortunately, no go. I’ve reinstalled SilverLight like 5 times, SD2 5 times, every time, it’ll go to that screen, then not any further… 🙁

  • Hanswurst

    Perhaps we must reboot after installing Silverlight, because it’s from Microsoft…

  • G. Falacio

    Nope, it won’t work, even following the supplementary steps you provide at the end of the blogpost.

    I even tried to reboot the Mc (!) with no success so far. The problem definitely remain by my side.

  • no way for me too :/

  • Sadly, I’m having the same issue but none of your fixes have solved it for me yet. Any other ideas?

  • Thanks but doesn’t work. When I uninstall Silverlight, there is still “The version of Silverlight installed is:
    Silverlight 4 (4.0.50826.0)

    You are ready to use Microsoft Silverlight”

    Why?

    Roman

  • Ah … if you installed the desktop2 preview, then it left a little something behind in YOUR (account) / Library / Application Support / Microsoft / Silverlight / OutOfBrowser folder. I found a folder with d.seesmic.com from August 2010. Once I removed it, the install worked in my account.

  • Weboutside

    Thanks but the procedure does not work for me. Have uninstalled silverlight and reinstalled several times and always get the message when trying to install SD2 : “The application could not be installed”

  • I had problems with this since the beginning, and this is the way I got it to work again…

    You need to delete the folder called “Silverlight” at path…

    “~/Library/Application Support/Microsoft/”

    Delete the whole folder (Silverlight) and it seems to work.

    Let me know if it worked for you…

  • Dennis A. Deschamps

    Seems like this posted fix here does not work. I followed the steps in chronological order and no go. There needs to be a fix as I also am having an issue with SeesmicDesktop-0.8.air and getting Adobe AIR 2.0.3 to install. What is up here :-(? The installation on MSWXPSP3 installed without a hitch.

  • Sorry once again. I am also not having any luck installing Seesmic Desktop 2 on a Macintosh with Snow Leopard X.6.4. I followed to the letter the fix from http://antoniu.me/2010/09/11/seesmic-desktop-2-mac/ and I also am having issues with installing SeesmicDesktop-0.8.air getting Adobe Air 2.0.3 installed.

  • Sadly, add me to the list that cannot get this installation to work as well. I’ve deleted the Silverlight plugin and the Microsoft directory from Mac OS 10.6.4 and I stall on the Microsoft Silverlight installation screen as it displays “One moment, please, while the current Silverlight installation status is determined…”

  • When I visit the download page on Seesmic I’m repeatedly prompted to install Silverlight. After I download and install Silverlight that prompt screen doesn’t change. I don’t get the option to download and install Seesmic DT 2.

  • After installing Silverlight I decided to quit my browser and then try the Seesmic Desktop 2 download again and this time Seesmic allowed the download of DT2 to take place.So that was the key – quitting the browser was necessary for the plugin to become activated. I tried several times without success to make the installation work with the step of quitting and relaunching browser and it wouldn’t work without this step.

  • I had no problem whatsoever with the install … my problem came when I tried to set up my accounts. Set up several Twitter accounts, Facebook, LinkedIn, Ping.FM, Foursquare … but after I saved each account and then went back to the main screen, it showed 8 instances of a single Twitter account and 8 instances of facebook, none of the others. It also wouldn’t let me delete any of them.

  • here is how I just got it to work on a mac that had the issue:

    -delete the folder called “Silverlight” at path…

    “~/Library/Application Support/Microsoft/Silverlight”

    -Go to “/Library/Internet Plug-Ins/” and delete “Silverlight.plugin”
    Also in “/Library/Internet Plug-Ins/” delete “WPFe.plugin”
    Go to “/Library/Receipts/” and delete “Silverlight.pkg”
    Also in “/Library/Receipts/” delete “Silverlight_W2_MIX.pkg”
    Also in “/Library/Receipts/” delete “WPFe.pkg”

    -delete /user/documents/seesmic

    -shut down the browser

    -go to silverlight and download it again
    http://www.microsoft.com/silverlight/

    -when installed shut down the browser

    -restart the browser (I used Safari)

    -go to http://seesmic.com/desktop and install

    worked like a charm (to be honest I think after deleting the files I even did a full reboot but I don’t think I needed to do that)

  • here is how I just got it to work on a mac that had the issue:

    -delete the folder called “Silverlight” at path…

    “~/Library/Application Support/Microsoft/Silverlight”

    -Go to “/Library/Internet Plug-Ins/” and delete “Silverlight.plugin”
    Also in “/Library/Internet Plug-Ins/” delete “WPFe.plugin”
    Go to “/Library/Receipts/” and delete “Silverlight.pkg”
    Also in “/Library/Receipts/” delete “Silverlight_W2_MIX.pkg”
    Also in “/Library/Receipts/” delete “WPFe.pkg”

    -delete /user/documents/seesmic

    -shut down the browser

    -go to silverlight and download it again
    http://www.microsoft.com/silverlight/

    -when installed shut down the browser

    -restart the browser (I used Safari)

    -go to http://seesmic.com/desktop and install

    worked like a charm (to be honest I think after deleting the files I even did a full reboot but I don’t think I needed to do that)

  • Anonymous

    Thanks for the tip, I’ve added it to the post.

  • Anonymous

    Thanks, I’ve incorporated this jnto the post.

  • thank you Antoniu

  • Following the process was not working when I realised that there is also a Silverlight folder in Users/User/Library/Application Suport/Microsoft.
    I followed the process and in addition deleted the Silverlight folder, restarted Safari, downloaded Silverlight, closed Safari, restarted Safari and downloaded SD2 and now it woks fine. Thanks to everybody for the support

  • That one worked well 🙂

  • Gk

    Anybody solve this problem ?

  • imref

    i followed your instructions the first time and was able to get Seesmic 2 up and running on my macbook air, but now i’m getting the blank white screen again. I’m done after over a year or using this app. Going to give tweet deck a shot now.

  • So I have tried to login to my Ping.fm account over the last week or so, and keep getting the following error on the page – if anyone could answer this I would be most gratefull;

    CONTENT ENCODING ERROR

    The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression.

    * Please contact the web site owners to inform them of this problem.

    This will be a complete travisty if they have one completely – anyone know anything?

    Regards
    Darren

  • So I have tried to login to my Ping.fm account over the last week or so, and keep getting the following error on the page – if anyone could answer this I would be most gratefull;

    CONTENT ENCODING ERROR

    The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression.

    * Please contact the web site owners to inform them of this problem.

    This will be a complete travisty if they have one completely – anyone know anything?

    Regards
    Darren

  • Rock on! Thank you for this fix!