multiple_users.md

Perfect. Let's set up a shared dev group so all dev users on your Mac can use and manage Homebrew safely and cleanly.

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👥 Shared Homebrew Setup for Multiple Dev Users

This setup will:

• Create a group called dev
• Add all your developer users to that group
• Set group ownership of Homebrew directories to dev
• Give group write permissions so everyone can install/update formulas

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✅ Step-by-Step

1. Create the dev group

sudo dseditgroup -o create dev

If it already exists, you'll get a message — that's fine.

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2. Add each user to the group

Replace username1, username2, etc. with actual short usernames of your dev accounts:

sudo dseditgroup -o edit -a sai -t user dev
sudo dseditgroup -o edit -a skv -t user dev

You can repeat for as many users as you want.

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3. Change group ownership of Homebrew

This sets the dev group as the owning group:

sudo chown -R :dev /opt/homebrew

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4. Give group write access

Allow all group members to write:

sudo chmod -R g+w /opt/homebrew

If you want to be stricter, you can fine-tune specific subdirectories, but this is safe for a trusted dev group.

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5. (Optional) Set the "setgid" bit

This ensures any new files/directories created in /opt/homebrew inherit the group dev:

sudo find /opt/homebrew -type d -exec chmod g+s {} \;