diff --git a/.github/workflows/R_CDM_check_hades.yaml b/.github/workflows/R_CDM_check_hades.yaml
index 2addc69..6fd55c4 100644
--- a/.github/workflows/R_CDM_check_hades.yaml
+++ b/.github/workflows/R_CDM_check_hades.yaml
@@ -79,6 +79,14 @@ jobs:
           
           library(reticulate)
           virtualenv_create("r-reticulate", Sys.which("python"), packages=python_packages)
+          # Detect the OS and set pip options accordingly
+          if (Sys.info()["sysname"] == "Darwin") {
+            # macOS
+            pip_options <- NULL
+          } else {
+            # Other OS, assume Linux or Windows needing CPU torch
+            pip_options <- c("--index-url https://download.pytorch.org/whl/cpu")
+          }
           virtualenv_install("r-reticulate", "torch", pip_options = c("--index-url https://download.pytorch.org/whl/cpu"))
           
           path_to_python <- virtualenv_python("r-reticulate")