Simon Willison’s Weblog

How Time Machine works. From John Siracusa’s Leopard review. The bad news is that Time Machine doesn’t deal well with huge files that have small changes made to them... such as Parallels VM images.

Posted 29th October 2007 at 9:56 am

Recent articles

OpenAI DevDay 2025 live blog - 6th October 2025
Embracing the parallel coding agent lifestyle - 5th October 2025
Designing agentic loops - 30th September 2025

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