diff --git a/environment-mac.yaml b/environment-mac.yaml
index 42a5c359e3..be63a05540 100644
--- a/environment-mac.yaml
+++ b/environment-mac.yaml
@@ -30,3 +30,5 @@ dependencies:
     - -e git+https://github.com/CompVis/taming-transformers.git@master#egg=taming-transformers
     - -e git+https://github.com/lstein/k-diffusion.git@master#egg=k-diffusion
     - -e .
+variables:
+  PYTORCH_ENABLE_MPS_FALLBACK: 1
diff --git a/ldm/simplet2i.py b/ldm/simplet2i.py
index 645f84af53..b83280471d 100644
--- a/ldm/simplet2i.py
+++ b/ldm/simplet2i.py
@@ -124,7 +124,7 @@ class T2I:
         grid=False,
         width=512,
         height=512,
-        sampler_name='klms',
+        sampler_name='k_lms',
         latent_channels=4,
         downsampling_factor=8,
         ddim_eta=0.0,  # deterministic