diff --git a/copyparty/__init__.py b/copyparty/__init__.py
index 7eb133e2..f2fc0fe7 100644
--- a/copyparty/__init__.py
+++ b/copyparty/__init__.py
@@ -16,6 +16,8 @@ if platform.system() == "Windows":
 VT100 = not WINDOWS or WINDOWS >= [10, 0, 14393]
 # introduced in anniversary update
 
+MACOS = platform.system() == "Darwin"
+
 
 class EnvParams(object):
     def __init__(self):
diff --git a/copyparty/svchub.py b/copyparty/svchub.py
index b3c3153a..dbf63fd7 100644
--- a/copyparty/svchub.py
+++ b/copyparty/svchub.py
@@ -8,7 +8,7 @@ import threading
 from datetime import datetime, timedelta
 import calendar
 
-from .__init__ import PY2, WINDOWS, VT100
+from .__init__ import PY2, WINDOWS, MACOS, VT100
 from .tcpsrv import TcpSrv
 from .up2k import Up2k
 from .util import mp
@@ -111,6 +111,8 @@ class SvcHub(object):
                 return msg
             elif vmin < 3:
                 return msg
+        elif MACOS:
+            return "multiprocessing is wonky on mac osx;"
         else:
             msg = "need python 2.7 or 3.3+ for multiprocessing;"
             if not PY2 and vmin < 3:
@@ -133,7 +135,7 @@ class SvcHub(object):
 
         if mp.cpu_count() <= 1:
             return False
-        
+
         try:
             # support vscode debugger (bonus: same behavior as on windows)
             mp.set_start_method("spawn", True)
diff --git a/scripts/make-sfx.sh b/scripts/make-sfx.sh
index 64e02789..63a922c3 100755
--- a/scripts/make-sfx.sh
+++ b/scripts/make-sfx.sh
@@ -24,6 +24,7 @@ command -v gfind >/dev/null && {
 	sed()  { gsed  "$@"; }
 	find() { gfind "$@"; }
 	sort() { gsort "$@"; }
+	unexpand() { gunexpand "$@"; }
 }
 
 [ -e copyparty/__main__.py ] || cd ..
@@ -71,7 +72,15 @@ cd sfx
 
 	tar -zxf $f
 	mv Jinja2-*/jinja2 .
-	rm -rf Jinja2-* jinja2/testsuite jinja2/tests.py
+	rm -rf Jinja2-* jinja2/testsuite jinja2/_markupsafe/tests.py jinja2/_stringdefs.py
+	
+	f=jinja2/lexer.py
+	sed -r '/.*föö.*/    raise SyntaxError/' <$f >t
+	tmv $f
+	
+	f=jinja2/_markupsafe/_constants.py
+	awk '!/: [0-9]+,?$/ || /(amp|gt|lt|quot|apos|nbsp).:/' <$f >t
+	tmv $f
 
 	# msys2 tar is bad, make the best of it
 	echo collecting source