diff --git a/README.md b/README.md
index 8f269c6..91e3b0e 100644
--- a/README.md
+++ b/README.md
@@ -6,12 +6,18 @@ Recipe to build [`gaomd/ikev2-vpn-server`](https://registry.hub.docker.com/u/gao
 
     docker run -d --name ikev2-vpn-server --privileged -p 500:500/udp -p 4500:4500/udp gaomd/ikev2-vpn-server
 
-## 2. Generate a .mobileconfig file for iOS 8
+## 2. Generate a .mobileconfig file for iOS / OS X
 
 *Replace `vpn1.example.com` with your own domain name and make sure it resolves to you server's IP address.*
 
     docker run -i -t --rm --volumes-from ikev2-vpn-server -e "HOST=vpn1.example.com" gaomd/ikev2-vpn-server generate-mobileconfig > ikev2-vpn.mobileconfig
 
-This will generate an `ikev2-vpn.mobileconfig` file, transfer it to your local computer via SSH tunnel (`scp`) or any other secure methods, then E-mail it to your iOS 8 devices via E-mail attachment.
+This command generates an `ikev2-vpn.mobileconfig` file, transfer it to your local computer via SSH tunnel (`scp`) or any other secure methods.
 
-*IKEv2 protocol requires iOS 8 or later, Mac OS X 10.10 (Yosemite) is not supported yet.*
+### 3. Install .mobileconfig
+
+- **iOS 9 or later**: AirDrop the `.mobileconfig` file to your iOS 9 device, finish the **Install Profile** screen;
+- **iOS 8 or later**: Send an E-mail to your iOS device with the `.mobileconfig` file as attachment, then tap the attachment to bring up the **Install Profile** screen;
+- **OS X 10.11 El Capitan or later**: Double click the `.mobileconfig` file to start the profile installation.
+
+*IKEv2 protocol requires iOS 8 or later, Mac OS X 10.11 El Capitan is supported as well.*