The easiest way to install sshfs on MacOS is via brew:
brew install Caskroom/cask/osxfuse sshfs
Mount the remote server:
sshfs user@server:/path /local/path -o defer_permissions
Example mount command:
sshfs root@12.34.56.78:/path ~/Documents/server -o defer_permissions
Unmount using:
umount -f /local/path