Data Guardian is an excellent security encryption tool on Mac. It supports 448-bit Blowfish encryption. It can safely protect your essential data, such as all kinds of password data.
A file and folder encryption tool, that not only protects your privacy, but also prevents anyone from accessing your files, and effectively prevents any virus against your files.
Encrypt your USB port. No USB device can copy the data in your computer. It supports white list feature. Besides, it can lock the disk drive, programs and devices, and block specific websites.