Why do I get "Operation not permitted" when trying to mount a volume using sshfs and MacFUSE?

It's possible that your user account is not able to mount volumes into the /Volumes directory directly. Have you tried mounting sshfs into a directory within your own home directory?

Failing that, you might need to have administrative (sudo) permissions to run sshfs. Try prefacing that command with sudo like so:

sudo sshfs daryls:/ /Volumes/daryls -oauto_cache,reconnect,volname=daryls

As an aside: to determine whether your Mac is running in 64-bit mode:

1. Choose About This Mac from the Apple menu.
2. Click More Info.
3. Select Software in the Contents pane.
4. Look for "64-bit Kernel and Extensions: Yes (or No)" under the System Software Overview heading.