diff --git a/.gitignore b/.gitignore
index b95c1d9..3529bc0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -64,3 +64,4 @@ src/Graph/Model/SymuMaster.log
 .idea/modules.xml
 .idea/symucore.iml
 .idea/vcs.xml
+.DS_Store
diff --git a/README.md b/README.md
index 392600e..90a6f6c 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,9 @@ Core objects and algorithms for the SymuVia ecosystem.
 
 ## Installation
 
+## Requirements
+Cmake installation
+
 ### From sources:
 
 Create the conda environnement: