I can't add a theme file to my /usr/share/vim/vim82/ Marcels-MBP:usr roottouch test Marcels-MBP:usr rootcsrutil authenticated-root status Authenticated Root status: disabled Marcels-MBP:usr rootpwd /usr touch: test: Operation not permitted Marcels-MBP:usr rootid uid=0(root) gid=0(wheel) groups=0(wheel),1(daemon),2(kmem),3(sys),4(tty),5(operator),8(procview),9(procmod),12(everyone),20(staff),29(certusers),61(localaccounts),80(admin),33(appstore),98(lpadmin),100(lpoperator),204(developer),250(analyticsusers),395(com.apple.accessftp),398(com.apple.accessscreensharing),399(com.apple.accessssh),400(com.apple.accessremoteae),701(com.apple.sharepoint.group.1) Marcels-MBP:usr rootdf Filesystem 512-blocks Used Available Capacity iused ifree %iused Mounted on /dev/disk1s7s1 975415384 29178256 663233768 5% 563932 4876512988 0% / devfs 379 379 0 100% 656 0 100% /dev /dev/disk1s4 975415384 2099296 663233768 1% 3 4877076917 0% /System/Volumes/VM /dev/disk1s2 975415384 553304 663233768 1% 815 4877076105 0% /System/Volumes/Preboot /dev/disk1s6 975415384 5632 663233768 1% 20 4877076900 0% /System/Volumes/Update /dev/disk1s1 975415384 235914960 663233768 27% 592697 4876484223 0% /System/Volumes/Data /dev/disk1s5 975415384 42834640 663233768 7% 563938 4876512982 0% /Volumes/Macintosh HD map auto_home 0 0 0 100% 0 0 100% /System/Volumes/Data/home I really don't know how to write a file on the ***** filesystem