how to create file on mac disk utility 10.12

Things have proceeded remarkably smoothly since version 10.7 switched to download-only installers, but there are still good reasons to want a reliable old USB stick. It was 2009 when Apple last released a new operating system on physical media. Be sure to pick something memorable.Further Reading macOS 10.12 Sierra: The Ars Technica review If you lose this password, you’ll lose access to the files inside your encrypted disk image. Provide a strong password-you can use the “Key” button here for tips on creating a strong one. When you opt for an encrypted drive, you’re also prompted to create an encryption password for your disk image. Image Format: Select “read/write disk image” so you can read from and write to the disk image at any time.Partitions: Select “Single partition – GUID Map” to use a single partition inside your disk image file.

If you’re encrypting sensitive files, you’ll probably want to choose 256-bit and accept the slight slow-down for more security. 256-bit is more secure, while 128-bit is faster.

Encryption: Choose either 128-bit or 256-bit AES encryption.

Format: Select Mac OS Extended (Journaled) as the file system.

You can enlarge or shrink the disk image later, if you need to. So, for example, if you create a 100 MB disk image file, it takes up 100 MB of hard drive space, even if you have’t move any files inside it yet. The container file takes up the maximum file size immediately, no matter how many files you put inside. For example, if you choose 100 MB, you’ll only be able to store up to 100 MB of files inside it. Size: Choose a size for your disk image file.This name is more of a description-it appears as the name of the container when the file is mounted. Name: Provide a name for the disk image file.Save As: Provide a file name for the disk image file.Here are the options you’ll need to configure: This create a new disk image (.dmg) file. In the Disk Utility window, head to File > New Image > Blank Image.

How to create file on mac disk utility 10.12