Apple mysteriously deleted DP1 from the purchases tab in the mac app store and a few days later it reappeared. But what they didn't tell you is that the reappeared one is actually an updated version of DP2, not DP1 again.
The new version of DP2 is build 16A239m whereas the previous version of DP2 was build 16A239j.
The installer name has changed too. It is now called
Install macOS Sierra Developer Beta
whereas before it was called
Install 10.12 Developer Preview
So to make the bootable usb of DP2 build 16A239m format an 8 GB (or preferably 16GB) USB3 drive which should be called Untitled and formatted as Mac OS Extended (Journaled). The installer should be called Install macOS Sierra Developer Beta.app and should be in your Applications folder.
Run this in terminal and wait about 20 minutes:
sudo /Applications/Install\ macOS\ Sierra\ Developer\ Beta.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ macOS\ Sierra\ Developer\ Beta.app --nointeraction
Also, reverting core storage still works in Sierra DP2.
If the installation creates a core storage logical volume you can revert it to get partitions back to normal by running these 2 commands in terminal.
diskutil cs list
and then
diskutil coreStorage revert lvUUID
where lvUUID is the last lvUUID reported by the previous Terminal command.
Then restart for everything to get back to normal after you have run these commands in Terminal.
This is good if you want the recovery partition to show up in the startup manager you get when booting up with the option key.
The new version of DP2 is build 16A239m whereas the previous version of DP2 was build 16A239j.
The installer name has changed too. It is now called
Install macOS Sierra Developer Beta
whereas before it was called
Install 10.12 Developer Preview
So to make the bootable usb of DP2 build 16A239m format an 8 GB (or preferably 16GB) USB3 drive which should be called Untitled and formatted as Mac OS Extended (Journaled). The installer should be called Install macOS Sierra Developer Beta.app and should be in your Applications folder.
Run this in terminal and wait about 20 minutes:
sudo /Applications/Install\ macOS\ Sierra\ Developer\ Beta.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ macOS\ Sierra\ Developer\ Beta.app --nointeraction
Also, reverting core storage still works in Sierra DP2.
If the installation creates a core storage logical volume you can revert it to get partitions back to normal by running these 2 commands in terminal.
diskutil cs list
and then
diskutil coreStorage revert lvUUID
where lvUUID is the last lvUUID reported by the previous Terminal command.
Then restart for everything to get back to normal after you have run these commands in Terminal.
This is good if you want the recovery partition to show up in the startup manager you get when booting up with the option key.