Recently, I upgraded to Mojave and I have discovered that filesystems to which I connect with Finder appear to have rw access, but I cannot change or create files. Similarly with NFS mounts. Having a file server that I cannot write to is not useful :-)
This worked prior to the upgrade, so I suspect Mojave, but I have been looking for similar issues for hours with no luck.
Config: Macbook Pro running Mojave 10.14.5, file server Netgear ReadyNAS OS6.10.1
Example (Finder->Go->Connect to Server->smb://fserver/pictures):
$ mount | grep pictures //tarsa@fserver/pictures on /Volumes/pictures (smbfs, nodev, nosuid, mounted by tarsa) $ ls -ld@hbefO /Volumes/pictures/ 32 drwx------ 1 tarsa family - 16K Jun 8 10:40 /Volumes/pictures// $ touch /Volumes/pictures/foo touch: /Volumes/pictures/foo: Permission denied
Example (mounting with nfs):
$ mount -o rw -t nfs fserver:/run/nfs4/data/Pictures ~/mnt $ mount | grep mnt fserver:/run/nfs4/data/Pictures on /Users/tarsa/mnt (nfs, nodev, nosuid, mounted by tarsa) $ ls -ld@hbefO ~/mnt 3 drwxrwxr-x 1 tarsa family - 1.3K Jun 8 10:40 /Users/tarsa/mnt/ $ touch ~/mnt/foo touch: /Users/tarsa/mnt/foo: Permission denied