Go to the Microsoft Store. Pay for "Office Home & Business 2021." Download the official PKG installer. You will get version 16.54 (or newer) legally. Then, if you need a ZIP for backup, use macOS’s built-in Archive Utility to compress the Office apps yourself.

Stay safe, keep your Mac clean, and enjoy the stability of perpetual Office without the subscription fatigue. Last updated: October 2025. Microsoft Office LTSC 2021 for Mac will reach end of support on October 13, 2026. Plan your upgrade to Office 2024 LTSC or Microsoft 365 accordingly.

In the ever-evolving landscape of productivity software, subscription models like Microsoft 365 have become the norm. However, a significant segment of users—from enterprise IT managers to privacy-focused freelancers—still craves the old-school, one-time purchase model. Enter Microsoft Office LTSC for Mac 2021 .

This article provides an exhaustive breakdown of Office LTSC 2021 for Mac, the significance of version 16.54, the ZIP distribution format, and how this all compares to the standard Microsoft 365 subscription. First, let’s decode the acronym: LTSC stands for Long Term Servicing Channel .

| Feature | Office LTSC 2021 (v16.54) | Microsoft 365 Family | | :--- | :--- | :--- | | | One-time ($150) | Monthly/Yearly ($70/year) | | Cloud Storage | 0 GB | 1 TB OneDrive | | AI Features | None (No Copilot) | Copilot Pro (paid add-on) | | Macros & VBA | Full support | Full support | | Real-time co-authoring | Yes (requires SharePoint) | Yes (native OneDrive) | | Feature updates | Frozen at 2021 | Quarterly new features | | Support lifespan | Until Oct 2026 | Continuous |

Double-click the PKG file. Grant permissions in System Settings > Privacy .