After I create a PCL project in VS2012 with the following configuration:
I try to add MVVMCross through Nuget installation, but the process rolls-back with this error:
I'm trying to install Hot Tuna Starter Pack for that matter. I have installed Xamarin trial version a week ago.
Is this a Xamarin error supporting PCLs?
Your screenshots show that you have a VSMonoTouch PCL hack in place - it's likely that will be causing issues - especially with net10
shown in the nuget log there. Try removing your VSMonoTouch XML files and then creating new projects for test.
Here is a setup that currently works for me - http://slodge.blogspot.ca/2013/04/my-current-pcl-setup-in-visual-studio.html
Note: It's likely that this post won't remain in-date for very long - Xamarin are releasing their PCL implementations at the moment.