Encrypt and protect a storage device with a password in disk utility on mac.
Lock usb drive mac.
If the device contains any files you want to save copy them to another storage device or volume.
Insert your usb drive into the mac and open a finder window.
Fortunately mac os x provides a few native solutions to help you protect your data on external hard drives.
One option is to fully encrypt the external drive and lock it with password.
On said site they ll find the oddly named rohos logon key which is a new the os x version at least downloadable application that turns the usb drive into a key that can lock a mac up tighter.
But in order to do so the external drive should be using the guid partition table gpt scheme.
Set up usb lock on pc or mac rohos key logon is a software that can program a usb flash drive a mobile phone or even a bluetooth device to act as the key to unlock your system.
The best part about this application is that it s available for both windows and macos devices.
In the disk utility app on your mac choose view show all devices.
Connect the usb flash drive to your mac and find its disk icon on the desktop or finder sidebar then right click and select encrypt usb stick name from the context menu.
In the sidebar select the storage device you want to.
If you do not see the encryption option in the drop down menu your usb flash drive has not been formatted using the guid partition map.