Browse Microsoft Fabric OneLake from Finder. Like OneDrive or Google Drive — but for your data lake. Multiple accounts in multiple tenants, side by side, with a single Homebrew install.
Pre-release, under active development.
📖 Documentation, screenshots and walkthroughs: ofem.debruyn.dev
brew install --cask sdebruyn/ofem/ofemRequires macOS 14 Sonoma or later on Apple Silicon. No system-level changes, no extra dependencies, no admin password.
- Multiple OneLake accounts across multiple Microsoft Entra tenants visible side by side in Finder.
- Online-only placeholders by default — files stream on demand, cached locally for instant reopen.
- Drag, drop, double-click, save in any app. Spotlight indexing and Quick Look work out of the box.
- One Finder sidebar entry per account (
OneLake — work,OneLake — client-a, …) so workspaces from different tenants never collide. macOS places each one under~/Library/CloudStorage/OneLake-<alias>/, the same way OneDrive and Google Drive do.
Things managed by Microsoft Fabric and not exposed through the file system: creating or renaming workspaces, managing permissions, changing the schema of Delta tables. Those still go through the Fabric portal.
OFEM ships with a multi-tenant Entra App Registration that works for most users. Tenants that block third-party multi-tenant apps can supply their own client ID in Add Account → Advanced — see Custom App Registration for the exact registration settings.
Issues · Discussions · Security (private)
Open source under the MIT License. See CONTRIBUTING.md for setup, and ofem.debruyn.dev/design/overview/ for the architecture overview.
Sponsor OFEM to help cover the Apple Developer Program membership and Azure costs.