diff --git a/README.md b/README.md
index c4076f8..f5abb16 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,18 @@ This 3 entries must be added at the end of each list.
 
 #### MAC
 
-TODO
+1. First it is necessary to [disable SIP](https://developer.apple.com/library/mac/documentation/Security/Conceptual/System_Integrity_Protection_Guide/ConfiguringSystemIntegrityProtection/ConfiguringSystemIntegrityProtection.html) That doesn't allow the editing of files in /usr/.
+
+2. You have to have to add the NanoS to /usr/libexec/SmartCardServices/drivers/ifd-ccid.bundle/Contents/Info.plist
+
+
+       In  <key>ifdVendorID</key>      add the entry  <string>0x2C97</string>
+       In  <key>ifdProductID</key>     add the entry  <string>0x0001</string>
+       In  <key>ifdFriendlyName</key>  add the entry  <string>Ledger Token</string>
+  
+This 3 entries must be added at the end of each list.
+
+3. [Enable SIP](https://developer.apple.com/library/content/documentation/Security/Conceptual/System_Integrity_Protection_Guide/ConfiguringSystemIntegrityProtection/ConfiguringSystemIntegrityProtection.html)
 
 #### Windows