I realized the creation dates of these files are much more recent than the time I have had this computer for, which means for all the time before my computer was doing fine without them, and the files are taking up quite some space and I would like to delete them, but even sudo rm -rf results in Operation not permitted. What is keeping root access from deleting them and how can I forcibly delete them? Specifically I would like to delete the AdhocSignatureCache.