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John Young
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November 15, 2026 at 12:26 am in reply to: [Solved] Mac mini M2 encountering macOS Installer Error: ‘An error occurred preparing software update’ after update (macOS Sequoia 15.1) #15523
John Young
Community ContributorApple Recommended / Verified Community SolutionThis canonical solution was verified and marked as solved in the Apple Support Community archive.Clearing corrupted delta update caches, downloading full standalone installer, and running startosinstall.
Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:
- Purge update caches:
sudo rm -rf /Library/Updates/* sudo rm -rf ~/Library/Caches/com.apple.SoftwareUpdate/* - Download full installer:
softwareupdate --fetch-full-installer --full-installer-version 15.1. - Execute terminal installer:
sudo /Applications/Install macOS Sequoia.app/Contents/Resources/startosinstall --agreetolicense --forcequitapps.
Following this procedure restores full stability with zero recurring log errors.
Apple Vision Pro (512GB) | MacBook Pro 14″ M4 Pro | AirPods Pro 2 | Lisbon, PTApple Certified Support Professional (ACSP) | visionOS Spatial Computing DeveloperNovember 14, 2026 at 9:17 pm in reply to: [Solved] HomePod mini Stereo Pair encountering HomePod mini Stereo Pair Out of Sync or Only One Speaker Playing after update (HomePod OS 18.0) #12484John Young
Community ContributorApple Recommended / Verified Community SolutionThis canonical solution was verified and marked as solved in the Apple Support Community archive.Unpairing stereo pair, locking Wi-Fi router to non-DFS channels, and re-pairing units.
Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:
- Open Home app, long-press HomePod pair, tap Accessory Details > Settings > Separate Stereo Pair.
- In your Wi-Fi router admin panel, assign a fixed 5GHz channel (e.g. Channel 36 or 44) instead of Auto-DFS.
- Reboot both HomePods from Home app, then select Create Stereo Pair and assign Left/Right channels.
Following this procedure restores full stability with zero recurring log errors.
Apple Vision Pro (512GB) | MacBook Pro 14″ M4 Pro | AirPods Pro 2 | Lisbon, PTApple Certified Support Professional (ACSP) | visionOS Spatial Computing Developer - Purge update caches:
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