diff --git a/environment.yml b/environment.yml
index c617eab96..f14dcac70 100644
--- a/environment.yml
+++ b/environment.yml
@@ -48,7 +48,6 @@ dependencies:
   - setuptools
   - simpy
   - slycot
-  - smt
   - sortedcontainers
   - sphinx
   - sphinxcontrib-applehelp
@@ -66,6 +65,7 @@ dependencies:
     - dearpygui
     - marmot-agents
     - osqp
+    - smt
 # Needs to be done outside of environment file:
 #  - m2w64-toolchain # [win]
 #  - libpython # [win]
diff --git a/setup.py b/setup.py
index ee5a50e54..14c973e76 100644
--- a/setup.py
+++ b/setup.py
@@ -75,6 +75,10 @@ def build_extension(self, ext):
             elif (mycompiler.find('ifort') >= 0 or mycompiler.find('icc') >= 0 or
                   mycompiler.find('icpc') >= 0):
                 tune = '-xHost'
+
+            elif platform.system() == 'Darwin':
+                # clang doesn't support -march=native
+                tune = '-mtune=native'
                 
             else:
                 tune = '-march=native -mtune=native'