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Anthropic Cowork feature creates 10GB VM bundle on macOS without warning

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Re: Anthropic Cowork feature creates 10GB VM bundle on macOS without warning

#151

macbook pro m4 bought last year. worked on so many codes and projects. never hot after closing lid. installed electron claude. closed lid and went to sleep and woke up to macbook that has been hot all night. uninstall claude. problem went away. i kept telling myself this BUT NEVER ELECTRON AGAIN.

I don't know if Electron is the issue here, my Wintel machine has Claude Code running 24/7 and doesn't ever heat up.

Might be virtualization woes or something adjacent.

Re: Anthropic Cowork feature creates 10GB VM bundle on macOS without warning

#152

Hi, Felix from Anthropic here. I work on Claude Cowork and Claude Code. Claude Cowork uses the Claude Code agent harness running inside a Linux VM (with additional sandboxing, network controls, and filesystem mounts). We run that through Apple's virtualization framework or Microsoft's Host Compute System. This buys us three things we like a lot: (1) A computer for Claude to write software in, because so many user pro…

> (2) Hard guarantees at the boundary: Other sandboxing solutions exist, but for a few reasons, none of them satisfy as much and allow us to make similarly sound guarantees about what Claude will be able to do and not to.

This is the most interesting requirement.

So all the sandbox solutions that were recently developed all over GitHub, fell short of your expectations?

This is half surprising since many people were using AI to solve the sandboxing issue have claimed to have done so over several months and the best we have is Apple containers.

What were the few reasons? Surely there has to be some strict requirement for that everyone else is missing.

But still having a 10 GB claude.vmbundle doesn't make any sense.

Re: Anthropic Cowork feature creates 10GB VM bundle on macOS without warning

#153

Hi, Felix from Anthropic here. I work on Claude Cowork and Claude Code. Claude Cowork uses the Claude Code agent harness running inside a Linux VM (with additional sandboxing, network controls, and filesystem mounts). We run that through Apple's virtualization framework or Microsoft's Host Compute System. This buys us three things we like a lot: (1) A computer for Claude to write software in, because so many user pro…

Any chance you guys could get the Claude Desktop installer fixed on Windows? It currently requires users to turn on "developer mode."

Sorry for the ask here, but unaware of other avenues of support as the tickets on the Claude Code repo keep getting closed, as it is not a CC issue.

https://github.com/anthropics/claude-code/issues/26457https:...

Re: Anthropic Cowork feature creates 10GB VM bundle on macOS without warning

#154

macbook pro m4 bought last year. worked on so many codes and projects. never hot after closing lid. installed electron claude. closed lid and went to sleep and woke up to macbook that has been hot all night. uninstall claude. problem went away. i kept telling myself this BUT NEVER ELECTRON AGAIN.

To be fair, ChatGPT seems to be a native app and still somehow managed to continuously burn some 30-40% of CPU on my mac that ended up being attributable to some shimmer animation for two never-loading icons.

Re: Anthropic Cowork feature creates 10GB VM bundle on macOS without warning

#155

Hi, Felix from Anthropic here. I work on Claude Cowork and Claude Code. Claude Cowork uses the Claude Code agent harness running inside a Linux VM (with additional sandboxing, network controls, and filesystem mounts). We run that through Apple's virtualization framework or Microsoft's Host Compute System. This buys us three things we like a lot: (1) A computer for Claude to write software in, because so many user pro…

Felix, is there any way you guys could fix this simple, but absolutely terribly annoying bug?

Claude mangles XML files with as an XML Tag to

https://news.ycombinator.com/item?id=47113548

Re: Anthropic Cowork feature creates 10GB VM bundle on macOS without warning

#156

Hi, Felix from Anthropic here. I work on Claude Cowork and Claude Code. Claude Cowork uses the Claude Code agent harness running inside a Linux VM (with additional sandboxing, network controls, and filesystem mounts). We run that through Apple's virtualization framework or Microsoft's Host Compute System. This buys us three things we like a lot: (1) A computer for Claude to write software in, because so many user pro…

It would be really nice to have an option to not do this since a ton of companies deny VMs in their group policies.

Re: Anthropic Cowork feature creates 10GB VM bundle on macOS without warning

#157

Earlier quoted context omitted.

The system data issue on macOS is awful. I use my MacBook for a mix of dev work and music production and between docker, music libraries, update caches and the like it’s not weird for me to have to go for a fresh install once every year or two. Once that gets filled up, it’s pretty much impossible to understand where the giant block of memory is.

I simply run GrandPerspective (GUI app, https://grandperspectiv.sourceforge.net/ ), or dust (terminal app, https://github.com/bootandy/dust ), to give me an idea of what is going on with disk usage.

Thank you for this! I just downloaded it and identified over 50G of junk. It's just what I have been looking for to help manage my drive utilization.

Re: Anthropic Cowork feature creates 10GB VM bundle on macOS without warning

#158
post #146

Earlier quoted context omitted.

I tried to use it right after launch from within Claude Desktop, on a Mac VM running within UTM, and got cryptoc messages about Apple virtualization framework. That made me realize it wants to also run a Apple virtualization VM but can’t since it’s inside one already - imo the error messaging here could be better, or considering that it already is in a VM, it could perhaps bypass the vm altogether. Because right now…

Does UTM/Apple's framework not allow nested virtualization? If I remember correctly from x86(_64) times, this is a thing that sometimes needs to be manually enabled.

I've come across two different answers regarding Apple's Virtualization.Framework support for nested virtualization:

1. Yes, but only Linux guests 2. Yes, but only M3+

https://github.com/apple/container/issues/191

Re: Anthropic Cowork feature creates 10GB VM bundle on macOS without warning

#159
post #66

Arguably, even without LLM, you too should be dev-ing inside a VM... https://developer.hashicorp.com/vagrant is still a thing. The market for Cowork is normals, getting to tap into a executive assistant who can code. Pros are running their consumer "claws" on a separate Mac Mini. Normals aren't going to do that, and offices aren't going to provision two machines to everyone. The VM is an obvious answer for this early…

Yeah, very easy to do today. May VPS providers help with this, checkout: https://exe.dev https://sprites.dev https://shellbox.dev

Yes! Whether VPS or local VM, this is a thing for good reasons.

Some reasons aren't even optional. Small but regulated entities exist, and most "Team" sized businesses aren't in Google apps or "the cloud" as they think about it, but are in M365, and do pay for cyber insurance.

Cowork with skills plugins that leverage Python or bash is a remarkably enabling framework given how straightforward it is. A skill engineer can sit with an individual contributor domain expert, conversationally decompose the expert's toil into skills and subcommands, iterate a few times, and like magic the IC gets hours back a day.

Cowork is Agents-On-Rails™ for LLM apps, like Rails was to PHP for web apps.

The VM makes that anti-fragile.

For any SaaS builders reading this: by far most white collar small business work is in Microsoft Office. The scarce "Continue with Microsoft" OIDC reaches more potential SMB desks than the ubiquitous "Continue with Google" and you don't have to learn the legacy SAML dance.

Anthropic seems to understand this. It's refreshing when a firm discovers how to cater to the 25–150 seat market. There's an uncanny valley between early adopters and enterprise contracts, but the world runs on SMBs.

Sign them all up!

Re: Anthropic Cowork feature creates 10GB VM bundle on macOS without warning

#160
post #156

Hi, Felix from Anthropic here. I work on Claude Cowork and Claude Code. Claude Cowork uses the Claude Code agent harness running inside a Linux VM (with additional sandboxing, network controls, and filesystem mounts). We run that through Apple's virtualization framework or Microsoft's Host Compute System. This buys us three things we like a lot: (1) A computer for Claude to write software in, because so many user pro…

It would be really nice to have an option to not do this since a ton of companies deny VMs in their group policies.

Agreed. Need to make this a choice for us.
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