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Archive for October 5, 2015

Configuring System Integrity Protection without booting to Recovery HD

October 5, 2015 4 comments

One interesting part of Apple’s developer documentation for System Integrity Protection (SIP) is the note shown below, indicating that it’s possible to configure SIP for environments that can’t access Recovery.

Apple developer documentation for configuring SIP outside recovery

When I followed up with Apple about this, I was told that this meant I could configure it using NetBoot, using a NetBoot set that included the needed Recovery environment.

The example used was leveraging a new option in System Image Utility to create a package-only installation NetBoot set.

System image utility package only installation

This new type of NetBoot set is is designed to install only scripts, configuration profiles and packages as opposed to installing an OS. For more details, see below the jump.

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Enabling an IPv6-only network using Internet Sharing on El Capitan

October 5, 2015 2 comments

One of the hidden features of OS X El Capitan is the ability to enable Internet Sharing to provide only IPv6 addresses. This feature was added to El Capitan to help developers ensure their apps are ready to work with IPv6. It uses NAT64, which facilitates communication between IPv6 and IPv4 hosts by using a form of NAT.

For those interested in having the ability to set up an IPv6-only network, see below the jump for the procedure.

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