diff --git a/configure b/configure
index f7dd626d22..14a8931a16 100755
--- a/configure
+++ b/configure
@@ -20147,8 +20147,7 @@ if test "$wxUSE_MAC" = 1; then
 if test "x$wxUSE_MACOSX_SDK" = "xno"; then
     wxUSE_MACOSX_SDK=
 elif test "x$wxUSE_MACOSX_SDK" = "xyes"; then
-    # TODO: Search for most recent SDK and use it.
-    wxUSE_MACOSX_SDK="/Developer/SDKs/MacOSX10.4u.sdk"
+        wxUSE_MACOSX_SDK="`xcode-select -p`/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk"
 fi
 
 
@@ -20198,7 +20197,7 @@ $as_echo "$as_me: WARNING: Could not determine deployment target from SDKSetting
         wxUSE_MACOSX_VERSION_MIN=
     fi
 elif test "x$wxUSE_MACOSX_VERSION_MIN" = "x"; then
-    wxUSE_MACOSX_VERSION_MIN=10.7
+    wxUSE_MACOSX_VERSION_MIN=10.9
 fi
 
 if test "x$MACOSX_SDK_OPTS" != "x"; then
diff --git a/configure.in b/configure.in
index 4b427d1804..0cb8ed4d74 100644
--- a/configure.in
+++ b/configure.in
@@ -1222,8 +1222,8 @@ dnl NOTE: We clobber wxUSE_MACOSX_SDK with the SDK path
 if test "x$wxUSE_MACOSX_SDK" = "xno"; then
     wxUSE_MACOSX_SDK=
 elif test "x$wxUSE_MACOSX_SDK" = "xyes"; then
-    # TODO: Search for most recent SDK and use it.
-    wxUSE_MACOSX_SDK="/Developer/SDKs/MacOSX10.4u.sdk"
+    dnl Try to use the default SDK.
+    wxUSE_MACOSX_SDK="`xcode-select -p`/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk"
 fi
 
 
@@ -1275,7 +1275,7 @@ dnl We need to quote the next line where we don't need macros and do need [] in
         wxUSE_MACOSX_VERSION_MIN=
     fi
 elif test "x$wxUSE_MACOSX_VERSION_MIN" = "x"; then
-    wxUSE_MACOSX_VERSION_MIN=10.7
+    wxUSE_MACOSX_VERSION_MIN=10.9
 fi
 
 if test "x$MACOSX_SDK_OPTS" != "x"; then
diff --git a/docs/changes.txt b/docs/changes.txt
index ff9a427e8e..9cb54f6b15 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -108,6 +108,9 @@ Changes in behaviour which may result in build errors
   wxArrayString. Please update your code to use the appropriate setter
   Set[Char]{In,Ex}cludes(), instead of mutating the internal data directly.
 
+- Under macOS, configure builds use 10.9 SDK by default now. 10.7 SDK is still
+  supported, but must be explicitly selected.
+
 
 3.1.3: (released 2019-??-??)
 ----------------------------