diff --git a/tools/openpilot_env.sh b/tools/openpilot_env.sh
index 35d221613c..ccf76db2bc 100644
--- a/tools/openpilot_env.sh
+++ b/tools/openpilot_env.sh
@@ -1,11 +1,19 @@
 if [ -z "$OPENPILOT_ENV" ]; then
-  export PATH="$HOME/.pyenv/bin:$PATH"
-  eval "$(pyenv init -)"
-  eval "$(pyenv virtualenv-init -)"
-
   export PYTHONPATH="$HOME/openpilot"
-  export PATH="$PATH:$HOME/openpilot/external/capnp/bin"
-  export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$HOME/openpilot/external/capnp/lib"
+
+  unamestr=`uname`
+  if [[ "$unamestr" == 'Linux' ]]; then
+    export PATH="$HOME/.pyenv/bin:$PATH"
+    eval "$(pyenv init -)"
+    eval "$(pyenv virtualenv-init -)"
+
+    export PATH="$PATH:$HOME/openpilot/external/capnp/bin"
+    export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$HOME/openpilot/external/capnp/lib"
+  elif [[ "$unamestr" == 'Darwin' ]]; then
+    # msgq doesn't work on mac
+    export ZMQ=1
+    export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES
+  fi
 
   export OPENPILOT_ENV=1
 fi
diff --git a/tools/replay/ui.py b/tools/replay/ui.py
index 0dfa36ac98..61f01dc4e2 100755
--- a/tools/replay/ui.py
+++ b/tools/replay/ui.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import argparse
 import os
 import sys
diff --git a/tools/replay/unlogger.py b/tools/replay/unlogger.py
index 374cd0992f..227091fb29 100755
--- a/tools/replay/unlogger.py
+++ b/tools/replay/unlogger.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import argparse
 import os
 import sys