diff --git a/mps/code/mps.xcodeproj/project.pbxproj b/mps/code/mps.xcodeproj/project.pbxproj
index 9b21bd4ec4f..feeeca7f54c 100644
--- a/mps/code/mps.xcodeproj/project.pbxproj
+++ b/mps/code/mps.xcodeproj/project.pbxproj
@@ -5500,7 +5500,6 @@
 				GCC_WARN_UNUSED_LABEL = YES;
 				GCC_WARN_UNUSED_PARAMETER = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.6;
 				SDKROOT = macosx;
 				SYMROOT = xc;
 				WARNING_CFLAGS = (
@@ -5950,7 +5949,6 @@
 				GCC_WARN_UNUSED_LABEL = YES;
 				GCC_WARN_UNUSED_PARAMETER = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.6;
 				SDKROOT = macosx;
 				SYMROOT = xc;
 				WARNING_CFLAGS = (
@@ -6019,7 +6017,6 @@
 				GCC_WARN_UNUSED_LABEL = YES;
 				GCC_WARN_UNUSED_PARAMETER = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.6;
 				SDKROOT = macosx;
 				SYMROOT = xc;
 				WARNING_CFLAGS = (
diff --git a/mps/manual/source/release.rst b/mps/manual/source/release.rst
index b2cffaffff0..9c031cd7dc1 100644
--- a/mps/manual/source/release.rst
+++ b/mps/manual/source/release.rst
@@ -12,10 +12,6 @@ Release 1.118.0
 New features
 ............
 
-#. The MPS now supports macOS 10.6 (Snow Leopard) or later; it no
-   longer supports 10.4 (Tiger) and 10.5 (Leopard). This is because
-   Xcode 10.0 no longer supports these versions.
-
 #. The MPS no longer supports building for the xci3ll platform (macOS,
    IA-32, Clang/LLVM) using Xcode. This is because Xcode 10.0 no
    longer supports this platform. The platform is still supported via
diff --git a/mps/readme.txt b/mps/readme.txt
index 0fef16b9a56..115ec3d01d3 100644
--- a/mps/readme.txt
+++ b/mps/readme.txt
@@ -80,7 +80,7 @@ The MPS is currently supported for deployment on:
 
 - FreeBSD 7 or later, on IA-32 and x86-64, using GCC or Clang/LLVM;
 
-- macOS 10.6 or later, on IA-32 and x86-64, using Clang/LLVM.
+- macOS 10.4 or later, on IA-32 and x86-64, using Clang/LLVM.
 
 The MPS is highly portable and has run on many other processors and
 operating systems in the past (see `Building the MPS