diff --git a/pixi.toml b/pixi.toml
index a5f686df..c1b14a62 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -6,6 +6,9 @@ authors = ["Jon Mease <jonmmease@gmail.com>"]
 channels = ["conda-forge"]
 platforms = ["osx-arm64", "osx-64", "linux-64", "win-64"]
 
+[system-requirements]
+macos = "12.0"
+
 [tasks]
 check-rs-fmt = "cargo fmt --all -- --check"
 check-rs-warnings = "export RUSTFLAGS=\"-D warnings\" && cargo check --tests"