diff --git a/.gitignore b/.gitignore
index 3a09fb6a..293a17bb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,10 @@
+# Cargo build
 /target
 Cargo.lock
+
+# Profile-guided optimization
 /tmp
 pgo-data.profdata
+
+# MacOS nuisances
+.DS_Store