Mac OS X 10.5.5 Build 9F13 Seeded - MacRumors
Skip to Content

Mac OS X 10.5.5 Build 9F13 Seeded

Apple appears to be sending out weekly seeds of the newest version of Mac OS X 10.5.5 to developers. The prior seed was released on August 7th.

This new version (Build 9F13) details 10 more bug fixes and unlike prior builds, Apple lists no known issues.

It's difficult to predict when the next version of Mac OS X will be released to the public, but it should be a free upgrade and include a number of bug fixes.

Popular Stories

Apple Logo Gradient 16x9 1

Apple Just Made an Extremely Rare Product Announcement

Thursday August 27, 2026 7:58 am PDT by
The new Mac mini and Mac Studio models unveiled by Apple this week are the company's first new Macs announced in August since 2020. It is extremely rare for Apple to announce new products of any kind in August, excluding smaller things like new color options and accessories. As mentioned, Apple's last notable August product announcement was in 2020, when it updated the 27-inch iMac and a...
Apple Surprise Shine

Apple Event: Six New Products to Expect on September 9

Thursday August 27, 2026 8:00 am PDT by
Apple has announced that it will be holding an event on Wednesday, September 9 at 10 a.m. Pacific Time, with the company widely expected to unveil the iPhone 18 Pro, iPhone 18 Pro Max, its first-ever foldable iPhone, and more. Other products expected to be announced at the event include an Apple Watch Series 12 with a ceramic case option, an Apple Watch Ultra 4, AirPods 5 with and without...
iPhone 18 Pro Dark Cherry Feature

iPhone 18 Pro Pre-Orders May Start at an Unusual Time

Friday August 28, 2026 8:17 am PDT by
Pre-orders of Apple's iPhone 18 Pro may not open until Saturday, September 12, a day later than the company's usual schedule, according to a new report. Apple is set to hold its annual iPhone event on Wednesday, September 9, where the iPhone 18 Pro models, its first-ever foldable iPhone, and the Apple Watch Series 12 and Ultra 4 are all expected to be announced. Under Apple's typical...