--- a/python/mozboot/mozboot/osx.py
+++ b/python/mozboot/mozboot/osx.py
@@ -19,24 +19,24 @@ from distutils.version import StrictVers
 from mozboot.base import BaseBootstrapper
 
 HOMEBREW_BOOTSTRAP = 'https://raw.githubusercontent.com/Homebrew/install/master/install'
 XCODE_APP_STORE = 'macappstore://itunes.apple.com/app/id497799835?mt=12'
 XCODE_LEGACY = ('https://developer.apple.com/downloads/download.action?path=Developer_Tools/'
                 'xcode_3.2.6_and_ios_sdk_4.3__final/xcode_3.2.6_and_ios_sdk_4.3.dmg')
 
 MACPORTS_URL = {
-    '11': 'https://distfiles.macports.org/MacPorts/MacPorts-2.3.4-10.11-ElCapitan.pkg',
-    '10': 'https://distfiles.macports.org/MacPorts/MacPorts-2.3.4-10.10-Yosemite.pkg',
-    '9': 'https://distfiles.macports.org/MacPorts/MacPorts-2.3.4-10.9-Mavericks.pkg',
-    '8': 'https://distfiles.macports.org/MacPorts/MacPorts-2.3.4-10.8-MountainLion.pkg',
-    '7': 'https://distfiles.macports.org/MacPorts/MacPorts-2.3.4-10.7-Lion.pkg',
-    '6': 'https://distfiles.macports.org/MacPorts/MacPorts-2.3.4-10.6-SnowLeopard.pkg', }
-
-MACPORTS_CLANG_PACKAGE = 'clang-3.3'
+    '13': 'https://distfiles.macports.org/MacPorts/MacPorts-2.4.2-10.13-HighSierra.pkg',
+    '12': 'https://distfiles.macports.org/MacPorts/MacPorts-2.4.2-10.12-Sierra.pkg',
+    '11': 'https://distfiles.macports.org/MacPorts/MacPorts-2.4.2-10.11-ElCapitan.pkg',
+    '10': 'https://distfiles.macports.org/MacPorts/MacPorts-2.4.2-10.10-Yosemite.pkg',
+    '9': 'https://distfiles.macports.org/MacPorts/MacPorts-2.4.2-10.9-Mavericks.pkg',
+    '8': 'https://distfiles.macports.org/MacPorts/MacPorts-2.4.2-10.8-MountainLion.pkg',
+    '7': 'https://distfiles.macports.org/MacPorts/MacPorts-2.4.2-10.7-Lion.pkg',
+    '6': 'https://distfiles.macports.org/MacPorts/MacPorts-2.4.2-10.6-SnowLeopard.pkg', }
 
 RE_CLANG_VERSION = re.compile('Apple (?:clang|LLVM) version (\d+\.\d+)')
 
 APPLE_CLANG_MINIMUM_VERSION = StrictVersion('4.2')
 
 XCODE_REQUIRED = '''
 Xcode is required to build Firefox. Please complete the install of Xcode
 through the App Store.
@@ -140,17 +140,21 @@ to pick up the environment changes so it
 Please start a new shell or terminal window and run this
 bootstrapper again.
 
 If this problem persists, you will likely want to adjust your
 shell's init script (e.g. ~/.bash_profile) to export a PATH
 environment variable containing the location of your package
 manager binary. e.g.
 
+Homebrew:
     export PATH=/usr/local/bin:$PATH
+
+MacPorts:
+    export PATH=/opt/local/bin:$PATH
 '''
 
 BAD_PATH_ORDER = '''
 Your environment's PATH variable lists a system path directory (%s)
 before the path to your package manager's binaries (%s).
 This means that the package manager's binaries likely won't be
 detected properly.