diff --git a/mountainduck/installation/index.md b/mountainduck/installation/index.md
index c79a2b32..72183265 100644
--- a/mountainduck/installation/index.md
+++ b/mountainduck/installation/index.md
@@ -29,15 +29,19 @@ You can choose to open Mountain Duck when you log into your computer. The applic
 **Finder Extension**<br/>
 Enable the Mountain Duck Finder Extension in *System Preferences → Extensions → Finder* by selecting the checkbox. This will enable:
 
-- **Context menu items** for files selectec on a mounted volume with options to *Reload* the folder listing and copy & open URLs of files
+- **Context menu items** for files selected on a mounted volume with options to *Reload* the folder listing and copy & open URLs of files
 - **Badges** on file icons to display sync status when *Smart Synchronization* is enabled for the bookmark
 
 :::{note}
-For **macOS Ventura and later**, the setting can be found in *System Settings → Privacy & Security → Extensions → Added Extensions*.
+In **macOS 13 (Ventura) or later**, the setting can be found in *System Settings → Privacy & Security → Extensions → Added Extensions*.
 :::
 
 ![Mountain Duck Finder Integration](_images/Mountain_Duck_Finder_Integration.png) 
 
+:::{warning}
+In **macOS 15 (Sequoia)** or later, the option to manage third-party extensions is no longer available in  *System Settings*.
+:::
+
 ::::
 ::::{group-tab} Windows