• Mac upgrade 10.15 Catalina failed to create a folder in the root directory.
  • 2. Restart the computer and holdcmd+REnter recovery mode and disable SIP:csrutil disable, and then restart.
  • 3. Remount the root directory:sudo mount -uw /, soft link your desired directory to the root directory, for example:sudo ln -s /Users/xxx/xxxBecause after you create a folder in the root directory, once you restart the computer, the directory you create is read-only again, so you need to soft link to the read/write directory;
  • 4. Enter the recovery mode and restart SIP.csrutil enable.