Verdict: Apple Intelligence in macOS 15 moves beyond standard chatbot functionality by deeply integrating AI into the operating system. Features like Rewrite, system-wide Image Playground, and the highly context-aware Siri overhaul are fundamentally changing how users interact with their Macs daily.
How We Researched
We tested Apple Intelligence features running locally on M-series Macs using the latest builds of macOS 15, comparing the speed, accuracy, and utility of these native AI tools against third-party alternatives like ChatGPT and Claude web interfaces.
1. System-Wide Writing Tools (Rewrite & Summarize)
Unlike third-party grammar tools, Apple Intelligence’s Writing Tools are built directly into the macOS text engine. Whether you are in Mail, Notes, Pages, or even third-party apps like Slack, you can highlight text and instantly ask the Mac to Rewrite it for tone (Professional, Friendly, Concise), Proofread it, or Summarize a long email thread. Because it runs locally on Apple Silicon, the processing is nearly instantaneous.
2. The New Context-Aware Siri
Siri has received its biggest overhaul in a decade. Instead of just answering web queries or setting timers, the new Siri understands on-screen context. You can say, “Add this address to John’s contact card” while looking at an email, and Siri will understand exactly what you mean. It can also execute complex, multi-step actions across different apps.
3. Smart Reply in Mail and Messages
Apple Intelligence analyzes incoming emails and messages and generates highly contextual Smart Replies. It doesn’t just offer generic “Sounds good” responses; it can extract questions asked in the email (e.g., “Are you attending on Friday?”) and generate a response that specifically answers those points based on your calendar availability.
4. Priority Notifications
Notification overload is a real problem. Apple Intelligence works in the background to understand your priorities. Instead of showing notifications chronologically, it stacks the most important alerts at the top—such as a time-sensitive email from your boss or a breaking news alert—while quietly grouping less important promotional emails at the bottom. It also generates brief summaries of long group chats directly in the notification banner.
5. Image Playground (On-Device Generation)
Image Playground allows you to generate custom images in seconds, right within apps like Messages, Freeform, and Keynote. You can create images based on concepts, themes, or even people in your Photo library (rendered in stylized animations or sketches). Because the generation model runs locally on your Mac’s Neural Engine, you don’t need an internet connection or a paid subscription to generate images.
Final Thoughts
Apple Intelligence isn’t about chatting with an AI; it’s about the AI quietly doing the heavy lifting in the background of apps you already use. Privacy remains its strongest selling point, with most processing done securely on-device. Which Apple Intelligence feature are you most excited to try on your Mac?
Frequently Asked Questions
Which Macs support Apple Intelligence?
Apple Intelligence requires a Mac with an Apple Silicon chip (M1, M2, M3, M4, or M5). Intel-based Macs do not have the required Neural Engine and are not supported.
Does Apple Intelligence cost money?
No, the core features of Apple Intelligence are included for free as part of macOS 15, iPadOS 18, and iOS 18 on supported devices.
Is my data sent to Apple for AI training?
Apple states that most processing happens on-device. For complex requests requiring Private Cloud Compute, data is processed on secure Apple servers but is never stored or used to train Apple’s base models.