Backport Mac installer fixes for git-based workflow (#2838)

Mac/BuildScript/build-installer.py

@@ -13,7 +13,7 @@
 Python 2.6.
 
 In addition to what is supplied with OS X 10.5+ and Xcode 3+, the script
-requires an installed version of hg and a third-party version of
+requires an installed third-party version of
 Tcl/Tk 8.4 (for OS X 10.4 and 10.5 deployment targets) or Tcl/TK 8.5
 (for 10.6 or later) installed in /Library/Frameworks.  When installed,
 the Python built by this script will attempt to dynamically link first to
@@ -23,7 +23,7 @@
 
 32-bit-only installer builds are still possible on OS X 10.4 with Xcode 2.5
 and the installation of additional components, such as a newer Python
-(2.5 is needed for Python parser updates), hg, and for the documentation
+(2.5 is needed for Python parser updates) and for the documentation
 build either svn (pre-3.4.1) or sphinx-build (3.4.1 and later).
 
 Usage: see USAGE variable in the script.
@@ -663,9 +663,8 @@ def checkEnvironment():
         base_path = base_path + ':' + OLD_DEVELOPER_TOOLS
     os.environ['PATH'] = base_path
     print("Setting default PATH: %s"%(os.environ['PATH']))
-    # Ensure ws have access to hg and to sphinx-build.
-    # You may have to create links in /usr/bin for them.
-    runCommand('hg --version')
+    # Ensure we have access to sphinx-build.
+    # You may have to create a link in /usr/bin for it.
     runCommand('sphinx-build --version')
 
 def parseOptions(args=None):