Mac OS X Developer Preview 4

Mac OS X Developer Preview 4 is the fourth and final Developer Preview of Mac OS X Public Beta. This build includes updates to the Aqua theme, making it resemble the Public Beta. Alongside, Dock magnification effects are enabled by default; this would be disabled by default in later builds and versions.

Installation
On QEMU, this build has a bug where the CD-ROM driver doesn't work properly, causing the boot to hang. To install this build on QEMU, the installation media has to be booted from a hard drive media and not from the CD-ROM drive.