Create NetBoot images in System Image Utility on Mac
A NetBoot network image allows you to start several Mac computers over an Ethernet network using the NetInstall service of the Server app. Workflows that create custom NetBoot network images can use a bootable volume, a disk image (of a bootable volume), or a macOS install app as the source.
In the System Image Utility app on your Mac, click the Source pop-up menu, choose a configured Mac volume or macOS install app, then click Next.
Select NetBoot image, then click Next.
Read the macOS License Agreement. If you agree, click Agree to continue.
(Optional) Click the Add button to add configuration profiles, packages, or scripts to your NetBoot image, then click Next.
Click the Remove button to remove any items.
(Optional) Specify system configuration options, then click Next.
To learn more about computer naming and ByHost preferences, see System Configuration settings.
(Optional) Click the Add button to bind the recipients of this image to a directory server, then click Next.
To learn more about binding to a directory server using System Image Utility, see Bind to a directory service.
Enter a network disk name and description, select how the image number is to be assigned, then click Next.
To learn more about defining image settings, see Define image settings.
(Optional) Select the computer models that can start up using this image, then click Next.
To learn more about restricting computer models, see Manage supported computer models.
(Optional) Click the Add button or click Import to add MAC addresses to an allow or deny list, then click Next.
In the Save As dialog, choose where to save the image (you can move it later), then click Save.
If NetInstall service is configured on an Ethernet network port and the Server app is set to serve images from a volume, the NetInstall service share point folder NetBootSPn appears in the pop-up menu.
Important: Do not attempt to edit content in the image destination folder while the image is being created.