update macOS version

Author: LWinterberg

src/pages/download/mac.astro

@@ -6,7 +6,7 @@ const { mac, version } = audacityReleases;
 ---
 
 <DownloadPageLayout
-  title="Audacity ® | Download for Mac OS"
+  title="Audacity ® | Download for macOS"
   description="Download Audacity for macOS and OS X"
   OS="macOS"
   version={version}
@@ -18,7 +18,7 @@ const { mac, version } = audacityReleases;
   <h3>About these downloads</h3>
   <h4 class="mt-4 md:mt-8">System requirements</h4>
   <p class="mt-2">
-    Audacity is tested on macOS 12 & 13, and may also work on any OS X version
+    Audacity is tested on macOS 14 & 15, and may also work on any OS X version
     released after and including OS X 10.9 Mavericks. Both Intel (x86_64) and
     Apple Silicon (ARM 64) versions are available, as well as a universal
     binary. There are no specific CPU or GPU requirements.</p>