Apple Seeds Safari 5.1 Developer Preview for Mac and Windows to Developers - MacRumors
Skip to Content

Apple Seeds Safari 5.1 Developer Preview for Mac and Windows to Developers

by

safari iconAlongside yesterday's high-profile developer seeds of OS X Lion Developer Preview 4, the first iOS 5 beta, and several iCloud-related betas including iTunes 10.5 and iPhoto 9.2, Apple also provided developers with a developer preview version of Safari 5.1 for both Mac and Windows. According to an announcement on Apple's developer portal, Safari 5.1 brings a number of enhancements to the company's flagship browser and will be available to the public sometime this summer.

Safari and Mac Developer Program members can download Safari 5.1 Developer Preview and take advantage of new technologies, including support for full-screen webpages, media caching with the HTML5 application cache, and better graphics acceleration on Windows.

A number of new APIs supporting Safari Extensions are also included in the update, which will presumably be made available to the public alongside the release of OS X Lion.

A separate Safari 5.0.6 release is available for developers to test on Mac OS X Leopard systems.

Top Rated Comments

198 months ago
Ha. Firefox is such bloat on macs.
It used to be good...
Score: 4 Votes (Like | Disagree)
MonkeySee.... Avatar
198 months ago
I hope it bloats less on PC. Or I will have to get a Mac soon.

You're gonna get a mac just for safari!? good going! :D
Score: 2 Votes (Like | Disagree)
198 months ago
I certainly hope this brings dramatic improvements over the current version. Safari is currently so unbelievably slow I can't even bring myself to use it. Pinwheels everywhere, and I have the latest hardware with maxed out RAM.

After the last update, this Apple's browser became really, really bad.
Mac mini Core 2 Duo with 8 GiB RAM and stock 5400 RPM 2.5" drive. Safari isn't slow at all. Plug-ins and Java are disabled.

Try to disable your plug-ins (in the Security options). Flash is probably the problem.
Score: 1 Votes (Like | Disagree)
198 months ago
Check the new setting!
Score: 1 Votes (Like | Disagree)
e-coli Avatar
198 months ago
I certainly hope this brings dramatic improvements over the current version. Safari is currently so unbelievably slow I can't even bring myself to use it. Pinwheels everywhere, and I have the latest hardware with maxed out RAM.

After the last update, this Apple's browser became really, really bad.
Score: 0 Votes (Like | Disagree)

Popular Stories

Four iPhone 18 Pro Colors Mock Feature

iPhone 18 Pro: Pre-Orders and Release Date

Sunday August 16, 2026 8:24 pm 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. As usual, the event is expected to take place in the first half of September. Labor Day falls on September 7 this year. The last time the holiday was on that day was in 2020, but the iPhone event that year was delayed until October due to the...
apple camera airpods

Apple's Camera-Equipped AirPods Confirmed: See Them in Action

Monday August 17, 2026 6:21 pm PDT by
Apple is working on camera-equipped AirPods that appear to be nearly ready to launch, based on a video MacRumors found in the macOS Tahoe 26.7 release candidate. In a short demo, a man holds a book up so the camera in the AirPods can see the title. "With Visual Intelligence, your world becomes savable. See something you like? Just ask me to save it for later," says the voiceover text. Here ...
imac video apple feature

September 1 to Mark the End of an Era at Apple

Tuesday August 18, 2026 9:14 am PDT by
Apple in April announced that Tim Cook will be stepping down as CEO at the end of this month, after 15 years of leading the company. Cook has been Apple's CEO since 2011 Effective September 1, Apple's hardware engineering chief John Ternus will become the company's next CEO, while Cook will become executive chairman of Apple's board of directors. In his new role, Apple said Cook will assist...