diff --git a/docs/readme/environment.md b/docs/readme/environment.md
index 33c61ad3f2f9..000279cc5204 100644
--- a/docs/readme/environment.md
+++ b/docs/readme/environment.md
@@ -19,11 +19,18 @@ brew install watchman
 
 ### Ruby
 
-MacOS ships with an old ruby version that is incompatible with this project
+MacOS ships with an old ruby version that is incompatible with this project.
 
-It is recommended to install a Ruby version manager such as [rbenv](https://github.com/rbenv/rbenv?tab=readme-ov-file#installation)
+It is recommended to install a ruby version manager, and use it to install the ruby version defined in the file `.ruby-version`.
 
-Install ruby version defined in the file `.ruby-version`
+For example, the following commands will [install `rbenv`](https://github.com/rbenv/rbenv?tab=readme-ov-file#installation) and use it to [install the configured ruby version](https://github.com/rbenv/rbenv#installing-ruby-versions):
+
+```bash
+brew install rbenv
+rbenv init
+rbenv install
+rbenv local  # if installation is successful, this will print the installed ruby version.
+```
 
 ### Gems
 
diff --git a/ios/mixpanel-iphone b/ios/mixpanel-iphone
new file mode 160000
index 000000000000..7485f53e642e
--- /dev/null
+++ b/ios/mixpanel-iphone
@@ -0,0 +1 @@
+Subproject commit 7485f53e642ebf85256e3db709e46b7cce5e9582