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: Navigate to your Applications folder and double-click Install macOS Sierra .

: If you are already on an earlier version of Sierra (like 10.12.5), you can download the macOS Sierra 10.12.6 Combo Update to jump straight to the final version. Step 3: Installation Process

Before diving into the download mechanics, it is essential to understand what makes this specific version (10.12.6) the most desirable among Sierra releases.

Run the .pkg installer found inside. This process unpacks the actual software and places a file named directly into your Applications folder. Method 2: Download via the Mac App Store Direct Link