Balsamiq for Desktop requires Adobe AIR, which is no longer supported.
Here are the steps I took to get AIR and Balsamiq to install.
gnome-keyring is required by AIR, gdebi is required to install the balsamiq package which will fail as “bad quality” in the Ubuntu Software Center. You can skip the gdebi install if you’re using X File Package (or probably anything other than Ubuntu Software Center) to install .deb packages.
sudo apt-get install gnome-keyring gdebi gdebi-core
Lots of sites say you need to install ia32-libs, which don’t exist in the Ubuntu repositories. Here is what’s required (taken from this post on askubuntu.com and <a href="http://askubuntu.com/a/440540/8750” title="askubuntu.com"target=”_blank">this other post on askubuntu.com )
sudo apt-get install gtk2-engines:i386 libart-2.0-2:i386 libcairo2:i386 libcanberra-gtk0:i386 libdatrie1:i386 libgail-common:i386 libgconf2-4:i386 libgtk2.0-0:i386 liblua5.1-0:i386 libpango1.0-0:i386 libpixman-1-0:i386 libqt4-network:i386 libqt4-test:i386 libqtcore4:i386 libthai0:i386 libbonobo2-0:i386 libglade2-0:i386 libgnomecanvas2-0:i386 libidl0:i386 liborbit2:i386 libwmf0.2-7:i386 gtk2-engines-murrine:i386 libxml2:i386 libxslt1.1:i386 libxt6:i386 lib32nss-mdns libnspr4-0d:i386 libnss3-1d:i386
Now, download AdobeAIRInstaller.bin version 2.6 and MockupsForDesktop64bit.deb. (If MockupsForDesktop64bit.deb link is dead, please download from here.)
cd ~/Downloads
chmod +x AdobeAIRInstaller.bin # make Adobe AIR executable
LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu ./AdobeAIRInstaller.bin # install Adobe AIR
Once AIR is installed, open your file manager, right-click on the balsamiq package and choose open with -> gdebi. The install should now complete.