How to mount a shared folder as disk with `rwxr-xr-x` permissions?
You need to specify the permissions when executing mount - the local file permissions or the permissions you set with chmod on the directory to which you mount your share will not be taken into consideration. 

You should do mount -t &lt;fs_type&gt; -o m=755 /path/to/source /destination

I'm not sure which filesystem type is what you're trying to mount (is it nfs? or hfs?) - you only refer to a host system and a guest system without any more details. You'll need to specify the correct file system type to the mount command (but I'm presuming you have already done that and it did work). Also, it would be a good idea for you to read the man for the relevant mount command (so, if the fstype is hfs, you'll need to read man mount_hfs; similarly, if it's nfs, you need to man mount_nfs; have a look at the bottom of man mount for more fs specific mount commands). 

Hope that helps!