try for now to stick on OSX 10.9 as minimum

CMakeLists.txt

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.7)
 
 # https://cmake.org/cmake/help/latest/variable/CMAKE_OSX_DEPLOYMENT_TARGET.html
-set(CMAKE_OSX_DEPLOYMENT_TARGET "10.7" CACHE STRING "Minimum OS X deployment version")
+set(CMAKE_OSX_DEPLOYMENT_TARGET "10.9" CACHE STRING "Minimum OS X deployment version")
 
 project(VCVRack)
 

azure-pipelines.yml

@@ -10,7 +10,7 @@ variables:
 
   # Xcode Version overview: https://gist.github.com/yamaya/2924292
   # available versions: https://github.com/Microsoft/azure-pipelines-image-generation/blob/master/images/macos/macos-10.14-Readme.md
-  XCODE_VERSION: 10.0
+  XCODE_VERSION: 10.2
 
 jobs:
   # Todo - run Linux build in a container with a more recent Ubuntu version, maybe also try CentOS and Arch builds?