linux - Visual Studio Preview for Mac and Xamarin Mono 4 Issue -

i have been using xamarin studio on mac write app, , sharing lot of code , projects linux mono project. reason have target mono / .net 4.5 framework.

in mac project settings target framework, mono / .net 4.5 under "unsupported framework" , has yellow caution symbol. understand , accept this, since need support linux , older mono 4 framework.

however, think visual studio preview mac changed installed mono runtime. when opened same project in vs4m, gave error:

could not find system.runtime 4.0.0.0

i tried run project in xamarin studio , got same error, within couple minutes received notification xamarin. after updating, app ran again.

i opened vs4m see if worked, , get:

could not launch visual studio
application requires newer version (4.8+) of mono framework.

is there better way deal this? need able build , debug project in linux using open source linux tools bit out of date xamarin , apparently not compatible.

will downloading 4.8 mono mess xamarin again?