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The sparse image will grow in size automatically as you add files to it. You can know put private files in the disk image. It will occupy xx MB on your hard disk to start with.ĭouble-click on it and enter your password to open the encrypted virtual disk on your desktop. (You can also select the Flash Disk instead of Desktop) Now on your desktop should be a disk image file with the ending “sparseimage”. The recommended is “128-bit AES encryption”.įrom the Partitions pop-up menu, choose Single partition - GUID Partition Mapįrom the Image Format pop-up menu, choose “sparse disk image”.Ĭlick Create. size.įrom the Format pop-up menu, choose OS X Extended (Journaled)įrom the Encryption popup menu, choose one of the two encryption methods that will password protect your disk image. The disk image starts out small and slowly increases in size as necessary up to the max. Under Name, give it a name like “My Secret Stuff” or something different if your prefer.įrom the Size pop-up menu, choose the maximum size this disk image can grow to. Choose the folder you wish to add a password to, then click Choose. This filename will be what you double-click on to make the virtual disk appear. In the popup under Save As, give the sparse image file a name. Open Disk Utility and select File > New Image > Blank Image. You can make a password-protected disk image, that starts out small but increases in size as you put files into it. This article presents an easy technique that Mac OS X users may implement, to protect their precious data. This will work with Flash drive or even to make a protected folder on your computer. How to Password Protect a Folder on a Mac Sometimes, we tend to share our Mac with a friend or a colleague, and at such times, we wish there was a way to password protect a folder which contains our personal stuff.