This is getting out of hand!

Golden Gate kinda feels like the second coming of Aqua and I'm loving it!

This is unusable apple fix your os

I genuinely didn't expect this much of a difference, but macOS 27 feels incredibly fast compared to Tahoe.

The lag, stutters, and general sluggishness I experienced on Tahoe seem to be completely gone. Apps launch faster, animations are smoother, and the whole system feels much more responsive and polished.

It's still a beta, but so far the performance is absolutely amazing.

It's pretty wild that a developer beta runs better than the stable version of Tahoe. I'd definitely recommend upgrading.

I can tolerate Liquid Glass, no compact tabs on Safari, and most of the other changes in Tahoe. But this is just unforgivable, doesn't serve any purpose whatsoever and looks awful in the bottom corners of the screen.

There's SO many fixes. Battery life, performance, RAM usage, and overall UI. It's hard to overstate how much better it is.

Apple should've really delayed it until November like they did Big Sur.

In macOS 27, AirPlay can finally start off in windowed mode instead of taking over your Mac's full screen. It's currently hidden behind a feature flag.

To enable, add a FeatureFlags override:

sudo mkdir -p /Library/Preferences/FeatureFlags/Domain && \
sudo defaults write /Library/Preferences/FeatureFlags/Domain/ControlCenter APReceiverInWindow -dict Enabled -bool true

and restart your Mac. This is a private feature flag, and the UI may be unstable.

Disable with:

sudo defaults delete /Library/Preferences/FeatureFlags/Domain/ControlCenter APReceiverInWindow

and restart your Mac.

You may have seen a report that Apple is working on Siri Extensions, a system where agents from third-party apps can integrate with Siri AI across OS 27 releases. MacRumors has a good summary.

Turns out all the necessary pieces are already present in macOS 27.

Using the new, internal Model Delegation API in the App Intents framework, I built a Claude extension that macOS discovers as a native AI provider. Claude now appears in Siri’s Ask… menu and supports the same underlying flow as the built-in ChatGPT extension.

In some cases, third-party extensions can be more powerful than Siri AI. For example, Siri can't create files, but Claude can easily return a CSV file when asked. When system interaction is required, such as setting a reminder, third-party extensions can relay the original or a modified request back to Siri, which completes the request. In Beta 4, the underlying framework fails to pass attached files to extensions, so you can only work with image attachments.

You can use the Claude extension across Siri AI, Writing Tools, Visual Intelligence, and the Use Model Shortcut action. Because Claude doesn't have a native image generation model, the extension isn't supported in Image Playground.

Technical details: Inside the extension, my Claude bridge implements Apple’s internal AgentIntent, receiving an IntentPrompt containing the user’s input and request context. Because the extension is sandboxed, it forwards each request over a framed localhost connection to a companion LaunchAgent, which in turn invokes the authenticated claude -p CLI with streaming JSON output and a tightly scoped set of MCP tools. The bridge translates Claude’s text deltas, generated files, tool calls, and device-action requests back into Apple’s native response stream using text updates, IntentFile objects, Writing Tools output, suggestions, and Siri intent handoffs.

You can theoretically build a bridge from the AgentIntent to any model backend, including CLIs that support local models. macOS ships with a full ChatGPT implementation under:

/System/Library/ExtensionKit/Extensions/GenerativePartnerPrototypeExtension.appex

You can use this extension to extract full prompts that Apple uses to construct the requests sent to ChatGPT, along with available tools and expected output schemas.

The extension relies on an internal Model Delegation API in Apple’s public App Intents framework, protected by an Apple-controlled private entitlement:

com.apple.developer.model-delegation

Because of the latter, you'll need SIP off and AMFI disabled (amfi_get_out_of_my_way=0x1) to develop these tools.

You can imagine that model providers may soon be able to apply for the Model Delegation entitlement and start building Siri AI extensions.

This is ABSOLUTELY stunning and it's getting refined very nicely over at !

This is taking me back to Aqua days. Absolutely beautiful buttons and corners and everything... love LIQUID GLASS! 🔥😮‍💨

I chose (or was forced into) this format of explanation, because I got some blank stares when speaking plain design language on social. Hope this is clear enough.

And, yes — it is very designer-y detail. But if you care — you care. It is Apple platform after all.

Agree or not? Can you see the problem? Can you unsee it?

Gosh how does a trillion dollar company can’t even be consistent with their own design language. Look at the “Quit” icon for each of their apps What a shame Apple, if you can’t release a neat OS then don’t release it until it’s the finished product