问题
I disabled SIP, but directory /usr/bin is write protected anyway. How to get write access for /usr/bin? Please don't suggest to switch to /usr/local/bin.
回答1:
Catalina has a new file system arrangement where most of the system files are write-protected. Apple uses two partitions, a read-only one for the main system files and a writeable one for other files, and melds them together and presents them as one to the user.
For details see the WWDC video What's New in Apple Filesystems
回答2:
I assume this answer might be relatively off-topic, as I'm not running the beta version of Catalina, but the official one.
In order to perform changes to /usr/bin, you'll have to perform the following steps.
- Disable System Integrity Protection (SIP).
- Mount
/as writeable.
Disable SIP
- Reboot your system into recovery mode (reboot and hold
cmd+Rwhile booting) - Use the appropriate credentials when prompted.
- Navigate to
Utilities -> Terminalin the top bar. - In the terminal session, execute
# csrutil disable. - Reboot into normal boot mode (
# reboot).
Mount / as writeable
With the OS in normal mode, start a new terminal session and execute the following:
$ sudo mount -uw /
Please note that / will be mounted as read-only on the next system boot.
In order to enable SIP, the process is exactly the same as disabling it, except for the fact that you would have to run # csrutil enable.
来源：https://stackoverflow.com/questions/57440334/sip-is-disabled-but-usr-bin-is-write-protected-anyway-macos-catalina-beta-10