Anthropic Cowork feature creates 10GB VM bundle on macOS without warning
Anthropic's Claude Desktop app is under fire for its "Cowork" feature, which quietly balloons to a 10GB VM bundle on macOS, causing severe performance issues. Hacker News users are lamenting the bloat, questioning the quality of AI-generated code, and discussing the general degradation of application hygiene, especially on macOS. It's a classic case of convenience leading to unexpected resource hogging, sparking a wider debate about modern software development practices and the implications of AI-assisted development.
The Lowdown
Users of Anthropic's Claude Desktop application are encountering significant performance degradation and disk space issues attributed to its "Cowork" feature on macOS. A GitHub issue, itself notably "Filed via Claude Code," details how the application creates and perpetually recreates a massive 10GB virtual machine bundle, leading to sluggish operation and system strain.
- The Claude Desktop "Cowork" feature creates a
claudevm.bundlefile containing arootfs.imgthat rapidly grows to 10GB. - This VM bundle is not automatically cleaned up, even after sessions, and regenerates quickly if manually deleted.
- The large file size and constant activity cause severe performance problems on macOS, including slow startup, UI lag, and increased CPU and swap usage, particularly on systems with 8GB RAM.
- Investigations suggest a memory leak or accumulating workload, as performance degrades over time even when the VM bundle is initially small or recently cleared.
- A temporary workaround involves manually deleting specific Claude application support directories, which provides immediate but fleeting performance improvement.
- The issue calls for stable CPU usage, proper VM bundle cleanup, and better performance on standard hardware.
This incident highlights a common frustration with modern applications consuming excessive resources without proper management, prompting users to reconsider the overhead associated with powerful AI tools and the development practices behind them.
The Gossip
Disk Drainage & Desktop Disaster
Many users commiserated over the increasing trend of applications, including Claude Desktop, indiscriminately consuming vast amounts of disk space and system resources on macOS. The discussion pointed to the notorious "System Data" issue on macOS, where large, unmanaged caches and temporary files (like Xcode SDKs or Podcasts downloads) lead to unexplained storage depletion, often requiring manual deletion or even fresh installs. There was also a strong sentiment against Electron-based apps for their resource intensiveness, with some users vowing to avoid them.
Algorithmic Anomaly or Accurate Account?
A significant thread questioned the reliability of the bug report itself, noting it was "Filed via Claude Code." Commenters debated whether AI-generated bug reports are genuinely more accurate or merely *sound* more accurate due to embellishment, potentially leading developers down misleading paths. This led to a broader discussion about the quality of software developed with heavy AI assistance, with some suggesting that while AI speeds development, it might also lead to less polished, resource-hungry products, turning early adopters into "rats in a lab."
Virtual Volume, Very Vexing
The technical specifics of Claude's VM implementation were dissected. Users noted that the Cowork feature leverages Apple's Virtualization framework, which can lead to issues like nested VM errors. Some pointed out the irony that the 10GB VM bundle starts largely pre-filled, leaving little functional space for the AI's actual work, leading to operational failures unless manually resized. This highlighted the challenges of sandboxing and resource management within AI tools, contrasting it with potentially lighter alternatives like Apple Seatbelt.