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 was demonstrated at the Apple Worldwide Developers Conference on 2000-05-15.

New features and changes

 * Setup has been slightly revamped in terms of design.
 * This build includes updates to the Aqua theme, making it resemble more to the Public Beta.
 * The Dock has been heavily revamped from Developer Preview 3, and now is more closer to the Public Beta. Some of these changes includes removing the application backgrounds and using a rectangular base to replace these backgrounds. The Dock is also translucent much like the menus and inactive applications.
 * Dock magnification effects are enabled by default; this would be disabled by default in later builds and versions.
 * The application icon that replaced the Apple logo in Developer Preview 2 and before is now gone, and replaced with the name of the running application.
 * A country flag is included to the right of the "Help" of the menu bar so the user can quickly change languages.

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.