UndigBlog
Plain-language guides to your Mac’s storage, privacy and performance.
How to free up space on your Mac, step by step
A step-by-step guide to freeing space on a Mac without breaking anything: what to check first, what is safe to delete, and what to leave alone.
Read article ›What is “System Data” on a Mac, and can you delete it?
“System Data” is a catch-all label in macOS storage. Learn what it contains, what is safe to remove, and how to shrink it without breaking your Mac.
Read article ›Deleted files but disk space didn’t free up? 4 reasons (and fixes)
You deleted gigabytes and your Mac’s free space didn’t change. Here are the four real reasons on macOS, and how to check each one.
Read article ›Xcode, node_modules and Homebrew: the developer files that fill your Mac
Where Xcode, simulators, node_modules, Homebrew, Docker and other dev tools hide gigabytes on a Mac, with the safe commands to clean them.
Read article ›Local AI models fill your Mac’s disk: where they are and how to clean them
Ollama, Hugging Face, LM Studio and PyTorch store multi-gigabyte models on your Mac. Here is where they live and how to remove the ones you don’t use.
Read article ›Which Mac apps can use your camera, microphone and screen? How to check
Old apps often keep access to your camera, microphone, screen and files. Here is how to see who has what on a Mac, and how to take it back.
Read article ›How to open a Mac app from an “unidentified developer”
macOS blocked an app because Apple couldn’t verify it. Here is why it happens, how to open it safely on macOS 14 and 15, and when you should not.
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