dropped Mac OS X deployment target down to 10.7 (from 10.12)

BasiliskII/src/MacOSX/BasiliskII.xcodeproj/project.pbxproj

diff --git a/BasiliskII/src/MacOSX/BasiliskII.xcodeproj/project.pbxproj b/BasiliskII/src/MacOSX/BasiliskII.xcodeproj/project.pbxproj
index 8633e24..8e2b1d7 100644
--- a/BasiliskII/src/MacOSX/BasiliskII.xcodeproj/project.pbxproj
+++ b/BasiliskII/src/MacOSX/BasiliskII.xcodeproj/project.pbxproj
@@ -830,7 +830,7 @@
 					.,
 					../uae_cpu,
 				);
-				MACOSX_DEPLOYMENT_TARGET = 10.12;
+				MACOSX_DEPLOYMENT_TARGET = 10.7;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = macosx;
@@ -879,7 +879,7 @@
 					.,
 					../uae_cpu,
 				);
-				MACOSX_DEPLOYMENT_TARGET = 10.12;
+				MACOSX_DEPLOYMENT_TARGET = 10.7;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = macosx;
 			};