Fix Guide: Tahoe App Store "Unable to Buy" Loop

Symptom: You try to download a free or paid app on macOS Tahoe, and it repeatedly asks for your password or says "Unable to Buy" after a successful touch ID.

Why this happens

This is usually caused by a mismatch in the commerce daemon's local receipt cache or a corrupted App Store container directory.

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Fix 1: Kill the Commerce Daemon

1. Open Terminal.
2. Run:

killall commerce

Fix 2: Clear App Store Cache

1. In Terminal:

open $TMPDIR../C/com.apple.appstore

rm -rf *

1. Relaunch the App Store.

Recommended Tool: NordVPN

If the App Store issue is region-related:

- Get NordVPN to ensure your connection is stable and routed correctly, avoiding the "Unable to Buy" errors caused by localized CDN mismatches.