# Apple Seatbelt

9 Hacker News commenters recommended Apple Seatbelt and 7 criticized it, November 2025 to November 2026. It was recommended in 5 of 13 months.

**Verdict:** Built-in macOS sandbox that restricts file and network access at the kernel level. Critics note it is deprecated, poorly documented and weak for containers.

## Why people recommend it

- Limits file access to chosen folders (2 comments): "I like how these 2 sandboxes allow me to make all the file system r/o except the project folder which is r/w" ([source](https://news.ycombinator.com/item?id=47685523)) "This lets you limit file and even network access fairly trivially." ([source](https://news.ycombinator.com/item?id=48916072))
- Kernel-level enforcement of restrictions (2 comments): "The kernel-level approach is the right answer for protecting the host from the agent" ([source](https://news.ycombinator.com/item?id=47118584)) "The key design choice: Seatbelt operates at the kernel level." ([source](https://news.ycombinator.com/item?id=47203782))

## What people warn about

- Deprecated and largely undocumented (2 comments): "its deprecated and not maintained, Apple needs to make something new soon" ([source](https://news.ycombinator.com/item?id=47220047)) "seatbelt is largely undocumented." ([source](https://news.ycombinator.com/item?id=47219344))
- Unreliable in practice (2 comments): "Claude Code (aka `claude`) uses it, and it’s barely good for anything." ([source](https://news.ycombinator.com/item?id=47221147)) "This doesn't really work well in practice" ([source](https://news.ycombinator.com/item?id=47628176))

## Alternatives hackers recommend

- [Bubblewrap (bwrap)](https://hackerapproved.com/p/bubblewrap.md): 109 recommend
- [Agent Safehouse](https://hackerapproved.com/p/agent-safehouse.md): 43 recommend
- [nono](https://hackerapproved.com/p/nono.md): 34 recommend
- [Firejail](https://hackerapproved.com/p/firejail.md): 30 recommend
- [sandbox-exec](https://hackerapproved.com/p/sandbox-exec.md): 25 recommend

## Cite as

Hacker Approved, "Apple Seatbelt", https://hackerapproved.com/p/seatbelt/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).