Apple Continues Work on First Leopard Update (10.5.1 Build 9B16) - MacRumors
Skip to Content

Apple Continues Work on First Leopard Update (10.5.1 Build 9B16)

In less than a week from the last developer seed, Apple has released another version of Mac OS X 10.5.1 to developers for testing.

The latest 10.5.1 seed (9B16) has "no known issues" but lists only a few updates since the previous build. These include updating applications even if moved out of /Applications, moving files to a different directory in Finder bug fix, and DNS resolution fixes. The update is not yet available to the general public.

10.5.1 represents the first maintenance release to Mac OS X 10.5 (Leopard) since its release only 3 weeks ago. While accelerated developer seeds traditionally indicate that Apple is approaching release, Apple's has yet to release the Mac OS X 10.4.11 update that has long been expected.

Popular Stories

iOS 26

iOS 26.4 Adds Two New Features to CarPlay

Tuesday March 24, 2026 1:55 pm PDT by
iOS 26.4 was released today, and it includes a couple of new features for CarPlay: an Ambient Music widget and support for voice-based chatbot apps. To update your iPhone 11 or newer to iOS 26.4, open the Settings app and tap on General → Software Update. CarPlay will automatically offer the new features so long as the iPhone connected to your vehicle is running iOS 26.4 or later....
Apple Business hero

Apple Unveils 'Apple Business' All-in-One Platform

Tuesday March 24, 2026 8:53 am PDT by
Apple today announced Apple Business, a new all-in-one platform that unifies device management, productivity tools, and customer outreach features. The service is designed to be a consolidated replacement for several of Apple's existing business-focused offerings, including Apple Business Essentials, Apple Business Manager, and Apple Business Connect. It provides organizations with a single...
AirPods Pro Firmware Feature

Apple Releases New Firmware for AirPods Pro 3, AirPods Pro 2 and AirPods 4

Tuesday March 24, 2026 12:31 pm PDT by
Apple today released new firmware for the AirPods Pro 2, AirPods Pro 3, and the AirPods 4. The firmware has a version number of 8B39, up from 8B34 on the AirPods Pro 3, 8B28 on the AirPods Pro 2, and 8B21 on the AirPods 4. There is no word on what's included in the firmware, but Apple has a support document with limited notes. Most updates are limited to bug fixes and performance...