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iOS

iOS is the operating system that powers iPhone, sharing the same XNU kernel as macOS despite offering a distinct touch-based interface and user experience. This content covers how to navigate iOS, locate system information, and understand what connects mobile and desktop Apple operating systems at a foundational level.

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About this video

iOS and macOS are distinct operating systems designed for very different form factors and interaction models, yet they share a common foundation. Both are built on the XNU kernel, the low-level software responsible for managing hardware resources, which means that despite the visual and functional differences between an iPhone and a Mac, the core architecture underneath is the same. Understanding this relationship helps clarify how Apple maintains consistency across its product ecosystem while tailoring each platform to its intended use case. On iPhone, the iOS interface is organized around a grid of app icons arranged across scrollable home screens, with all navigation handled through touch gestures rather than a mouse or trackpad. System information such as the current iOS version, in this case 17.6.1, is accessible through Settings under the General and About sections, a standard reference point for identifying software versions and device details. Built-in applications like Calculator demonstrate how core functionality is reimagined for a mobile context, reflecting the broader design philosophy of iOS as a platform optimized for handheld, touch-first interaction.

What you'll learn

What's covered

iOS on iPhone

Aligned to

CompTIA A+ Core 2
1.8 Explain common OS types and their purposes.
CompTIA Tech+
2.6 Compare and contrast common computing devices and their purposes.
Cisco CCST IT
4.3 Assist users in resolving mobile device issues

Key terms

Internetworking Operating System
IOS
Cisco's proprietary operating system running on most Cisco routers and switches, providing a command-line interface for device configuration, management, and monitoring. IOS is the foundation for Cisco's network equipment and has evolved into variants such as IOS XE, IOS XR, and NX-OS.
Kernel
The core component of an operating system that manages hardware resources, process scheduling, and memory, operating at the highest privilege level and separating user-facing processes from direct hardware access.
Operating System
OS
System software that manages hardware resources, provides common services for application software, and acts as an intermediary between users and computer hardware. Examples include Windows, macOS, and Linux.

Topics

Ios Mobile Operating Systems Xnu Kernel Macos Operating Systems Apple Ecosystem

Transcript

Our mobile devices look and feel very different from a desktop or laptop, and how we interact with them when we scroll around is very different than how I interact with a desktop or laptop. But the core of it is actually still the same: the kernel is still the same.

So what we have right here, this is an iPhone, and the operating system on it is called iOS, versus my MacBook Pro back here, which has an operating system on it that's called macOS. However, if we look at the kernel, they have the same kernel. They both have the XNU kernel on it, and that's what's operating the hardware.

Now, what we have here is icons, and I can scroll back and forth to these different windows. What I'm going to do is actually open up the settings on here and go into General, and we can see About this phone. It's got some name, and we've got the iOS version, so it's 17.6.1. So we see some information on this phone right here.

The other thing that I'll just show you, since we've done this with other operating systems, is let's open up the calculator. Here's what the calculator looks like on here. It's kind of nice; I actually really love the calculator function of this.

So this is iOS on the mobile device, iPhone specifically.

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