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These seem to not apply for everyone on 10.11 any more (as explained in Homebrew/homebrew#45387). Closes Homebrew/homebrew#45387. Closes Homebrew/homebrew#45566. Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
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El Capitan & Homebrew
Part of the OS X 10.11/El Capitan changes is something called System Integrity Protection or "SIP".
SIP prevents you from writing to many system directories such as /usr, /System & /bin, regardless of whether or not you are root. The Apple keynote is here if you'd like to learn more. As noted in the keynote, Apple is leaving /usr/local open for developers to use, so Homebrew can still be used as expected.
One of the implications of SIP was that you could not simply create /usr/local if you had removed it. This issue was fixed with the com.apple.pkg.SystemIntegrityProtectionConfig.14U2076 update.
If you haven't installed Homebrew in /usr/local or another system-protected directory, this document does not apply to you.
This is how to fix Homebrew on El Capitan if you see permission issues:
If /usr/local exists already:
sudo chown -R $(whoami):admin /usr/local
If /usr/local does not exist:
First, try to create /usr/local the normal way:
sudo mkdir /usr/local && sudo chflags norestricted /usr/local && sudo chown -R $(whoami):admin /usr/local
If you see permission issues instead try:
- Reboot into Recovery mode (Hold Cmd+R on boot) & access the Terminal.
- In that terminal run:
csrutil disable - Reboot back into OS X
- Open your Terminal application and execute:
sudo mkdir /usr/local && sudo chflags norestricted /usr/local && sudo chown -R $(whoami):admin /usr/local
- Reboot back into Recovery Mode & access the Terminal again.
- In that terminal execute:
csrutil enable - Reboot back into OS X & you'll be able to write to
/usr/local& install Homebrew.