Since the standalone app won't run, you can use the browser-based version. It offers most of the same features, including messaging and file sharing. : web.whatsapp.com
If you'd like to try upgrading your system, (e.g., MacBook Air Early 2014)? I can help you check its highest possible OS version. Download WhatsApp Desktop for Mac - Free - older version whatsapp for macos 10.13.6
WhatsApp on macOS 10.13.6 is a lesson in graceful degradation. The official native app is an impossibility, but the core utility of the service remains intact through WhatsApp Web in a modern browser like Chrome. By accepting a browser-based interface and forgoing deep system integration, High Sierra users can continue to send messages, share media, and make voice/video calls (through the phone, as desktop calling requires a newer OS) without issue. Since the standalone app won't run, you can
Guide to Using WhatsApp on macOS 10.13.6 High Sierra The , as Meta platforms require macOS 12.1 (Monterey) or newer . Attempting to open the modern app store version will result in installation failures or immediate error warnings. I can help you check its highest possible OS version
Use the OpenCore Legacy Patcher (OCLP) to install modern macOS versions.