diff --git a/doc/CompilationPython.md b/doc/CompilationPython.md
index 85aa4ab8..5f2101a7 100644
--- a/doc/CompilationPython.md
+++ b/doc/CompilationPython.md
@@ -42,6 +42,12 @@ sudo apt install catch python3-dev
 brew install catch2
 ```
 
+#### Case-sensitivity
+Note that to build pypointmatcher, your filesystem must be case-sensitive.
+This applies especially to MacOS, where the APFS is case-insensitive for legacy reasons.
+To overcome this, open `Disk Utility` and add a new case-sensitive APFS volume to your container.
+Then, move libpointmatcher to the new volume.
+
 The rest of this tutorial will guide you through the necessary steps to compile pypointmatcher.
 
 ## pybind11