Suddenly, i lost all Geny motion emulators (maybe after upgrading to Geny motion 2.2, not sure) and when ever i download a new virtual machine or emulator i get the \"failed
I had the same problem, I fixed it with uninstalling, reinstalling and running Gennymotion with Admin rights. Make sure you not upgrade Oracle VM and use the one you installed with Genymotion. Also at installing Genymotion make sure you reinstall VM too. It should work, I lost my devices too and this method only solve the OVA problem. If you run the virtual device and get an error, reboot computer, if you didn't do after installing Oracle VM. Hope it helped.
Try to upgrade VirtualBox to the latest release, this solved the problem for me.
I had deleted /Users//.Genymobile/ directory and Genimotion started work fine
I downloaded ova that match with version i want (example android 5)
http://fatihcamuz.com/2015/04/download-links-of-genymotion-ova/
then add ova file to genymotion
https://www.youtube.com/watch?v=0MiYhVUv4KE
I had the same issue and also tried deleting the Genymotion cached .ova file and old images but to no avail.
To get my Genymotion working again in my environment I completely uninstalled VirtualBox and Genymotion using the TrashMe app to ensure no trace was left on my system. You can achieve the same result with the free app App Cleaner.
I then completely deleted the ~/.Genymobile directory as this seems to get left behind when deleting/uninstalling Genymotion. I think this is the only thing I did differently this time.
I then re-downloaded the latest versions of VirtualBox and Genymotion and installed them in that order. (Versions at time of writing: VB - 4.3.13 r93733 / GM - 2.2.2)
I then launched Genymotion, connected to my account, added a new device and I am now back up and running.
Hopefully that helps..
make sure you choose the correct android sdk