Build error after moving project from VS2015 to Xamarin Studio on Mac

I have googled and can't find the answer to this, I also can't find the error in my project files at all so I don't know where to look at this point. I moved a project that builds and runs perfectly fine on Android and iOS from Visual Studio 2015 to Xamarin Studio on Mac. I am unable to build and run for Android or iOS, I cannot even build the PCL library by itself without getting this error. I am hoping that somebody might recognize this and point me to a fix. Thanks!
: error : Error building target AfterCompile: Microsoft.Build.BuildEngine.InvalidProjectFileException: Unable to parse condition "Exists(@(IntermediateAssembly))" : Expected an item list at position 8 in condition "Exists(@(IntermediateAssembly))". Missing opening parantheses after the '@'. ---> Microsoft.Build.BuildEngine.ExpressionParseException: Expected an item list at position 8 in condition "Exists(@(IntermediateAssembly))". Missing opening parantheses after the '@'. at Microsoft.Build.BuildEngine.ConditionParser.IsAtToken (Microsoft.Build.BuildEngine.TokenType type, System.String error_msg) [0x00027] in <filename unknown>:0 at Microsoft.Build.BuildEngine.ConditionParser.ParseReferenceExpression (System.Char prefix) [0x0005b] in <filename unknown>:0 at Microsoft.Build.BuildEngine.ConditionParser.ParseFactorExpression () [0x000d3] in <filename unknown>:0 at Microsoft.Build.BuildEngine.ConditionParser.ParseFunctionArguments () [0x0006a] in <filename unknown>:0 at Microsoft.Build.BuildEngine.ConditionParser.ParseFunctionExpression (System.String function_name) [0x00000] in <filename unknown>:0 at Microsoft.Build.BuildEngine.ConditionParser.ParseFactorExpression () [0x00067] in <filename unknown>:0 at Microsoft.Build.BuildEngine.ConditionParser.ParseRelationalExpression () [0x00000] in <filename unknown>:0 at Microsoft.Build.BuildEngine.ConditionParser.ParseBooleanOr () [0x00000] in <filename unknown>:0 at Microsoft.Build.BuildEngine.ConditionParser.ParseBooleanAnd () [0x00000] in <filename unknown>:0 at Microsoft.Build.BuildEngine.ConditionParser.ParseBooleanExpression () [0x00000] in <filename unknown>:0 at Microsoft.Build.BuildEngine.ConditionParser.ParseExpression () [0x00000] in <filename unknown>:0 at Microsoft.Build.BuildEngine.ConditionParser.ParseCondition (System.String condition) [0x00007] in <filename unknown>:0 at Microsoft.Build.BuildEngine.ConditionParser.ParseAndEvaluate (System.String condition, Microsoft.Build.BuildEngine.Project context) [0x0000d] in <filename unknown>:0 [MVID] 3e7ea593d23144cbb883e34cab62b781 0,1,2,3,4,5,6,7,8,9,10,11,12 --- End of inner exception stack trace --- at Microsoft.Build.BuildEngine.ConditionParser.ParseAndEvaluate (System.String condition, Microsoft.Build.BuildEngine.Project context) [0x00056] in <filename unknown>:0 at Microsoft.Build.BuildEngine.Target.BuildActual (System.String built_targets_key, System.Boolean& executeOnErrors) [0x00054] in <filename unknown>:0 at Microsoft.Build.BuildEngine.Target.Build (System.String built_targets_key, System.String parentTarget, System.Boolean& executeOnErrors) [0x00089] in <filename unknown>:0 at Microsoft.Build.BuildEngine.Target.BuildOtherTargets (System.Collections.Generic.IEnumerable1[T] targetNames, System.Action1[T] missing_target, System.Boolean& executeOnErrors) [0x00062] in <filename unknown>:0 at Microsoft.Build.BuildEngine.Target.BuildAfterThisTargets (System.Boolean& executeOnErrors) [0x0000a] in <filename unknown>:0 at Microsoft.Build.BuildEngine.Target.BuildActual (System.String built_targets_key, System.Boolean& executeOnErrors) [0x000ba] in <filename unknown>:0 [MVID] 3e7ea593d23144cbb883e34cab62b781 0,1,2,3,4,5