diff --git a/.changeset/fix-macos-casing.md b/.changeset/fix-macos-casing.md
new file mode 100644
index 000000000..735318ab4
--- /dev/null
+++ b/.changeset/fix-macos-casing.md
@@ -0,0 +1,5 @@
+---
+default: patch
+---
+
+Fix Mac OS to macOS in the the devices tab
diff --git a/src/app/utils/user-agent.ts b/src/app/utils/user-agent.ts
index 0e82daf0e..e1a2e0a61 100644
--- a/src/app/utils/user-agent.ts
+++ b/src/app/utils/user-agent.ts
@@ -9,6 +9,12 @@ const isMobileOrTablet = (() => {
   return false;
 })();
 
+const normalizeMacName = (os?: string) => {
+  if (!os) return os;
+  if (os === 'Mac OS') return 'macOS';
+  return os;
+};
+
 const isMac = result.os.name === 'Mac OS';
 
 export const ua = () => result;
@@ -17,7 +23,7 @@ export const mobileOrTablet = () => isMobileOrTablet;
 
 export const deviceDisplayName = (): string => {
   const browser = result.browser.name;
-  const os = result.os.name;
+  const os = normalizeMacName(result.os.name);
   if (!browser || !os) return 'Sable Web';
   return `Sable on ${browser} for ${os}`;
 };