Apple Seeds Mac OS X 10.5.5 (9F5) - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Seeds Mac OS X 10.5.5 (9F5)

Apple has seeded the first version of Mac OS X 10.5.5 (Build 9F5) to developers tonight. This is the first new seed of Mac OS X since the released of Mac OS X 10.5.4 on June 30th.

Apple instructs developers to focus on testing a number of areas including Time Machine, AirPort, Networking, Spotlight, and many others. Apple details over 83 other bug fixes and issues addressed including a few potential kernel panic scenarios.

At this early stage, there appear to be some major issues as Apple warns developers not to install this seed on the MacBook Air, MacBook, Mac Mini, iMac (with Intel integrated graphics).

Popular Stories

Apple Event Logo

Apple Working on All-New Operating System

Wednesday July 29, 2026 11:39 am PDT by
Apple is developing an all-new operating system that is essentially a mix of tvOS, watchOS, and iOS, according to Bloomberg's Mark Gurman. In a report this week, he said the operating system will feature a grid of icons, widgets, and apps, along with customizable clock faces. The new software platform is intended for Apple's long-rumored smart home hub. With built-in facial recognition,...
imac video apple feature

Apple Made Its Second-Biggest Acquisition Ever This Year

Wednesday July 29, 2026 12:03 pm PDT by
Apple this year acquired Israeli startup Q.ai for close to $2 billion, according to the Financial Times. That would make this Apple's second-biggest acquisition ever, after it paid $3 billion for the popular headphone maker Beats in 2014. This is also the largest known Apple acquisition since the company purchased Intel's smartphone modem business and patents for $1 billion in 2019. Q.ai...
Four iPhone 18 Pro Colors Mock Feature

iPhone 18 Pro and iPhone Ultra: Pre-Orders and Release Date

Thursday July 30, 2026 6:12 am PDT by
Apple has yet to reveal when the iPhone 18 Pro and iPhone Ultra will be announced and released, but the dates usually follow a familiar pattern. Labor Day is September 7 this year. The last time the holiday fell on that day was in 2020, but the iPhone event that year was delayed until October due to the COVID-19 pandemic. So, the last time Labor Day was on September 7 in a normal year was in ...

🔗 Related Apple News & Rumors

Stay updated with the latest Apple ecosystem news and verified rumors