demo · v139
macOS Support Probe
Chrome 139 is the last build that supports macOS 11 (Big Sur). Detect your OS via User-Agent Client Hints, then see the support timeline.
Click "Detect" or pick a version.
the code
// User-Agent Client Hints:
const ua = await navigator.userAgentData.getHighEntropyValues(["platformVersion"]);
const major = parseInt(ua.platformVersion, 10);
if (major <= 11) showUpgradeNudge();