Staying on 10.10.5 with WhatsApp Web is often the smarter choice: your machine remains responsive, and for text messaging, you lose almost nothing.
| Step | Action | |------|--------| | 1 | Open a that still runs on 10.10.5. Recommended: Firefox Legacy or Chromium Legacy (see section 3.2). | | 2 | Navigate to: https://web.whatsapp.com | | 3 | Open WhatsApp on your iPhone or Android phone. | | 4 | Go to Settings → Linked Devices → Link a Device (on phone). | | 5 | Scan the QR code displayed on your Mac’s screen. | | 6 | WhatsApp conversations will now sync in the browser. | whatsapp for mac os x 10.10.5
Official support for Mac OS X 10.10.5 ended several years ago. WhatsApp frequently updates its security protocols and features, which older operating systems cannot support. Staying on 10