1. 视窗：
Windows 是一组由 Microsoft Incorporation 提供的各种专有图形操作系统。它也被称为Microsoft Windows 。它目前包括 Windows NT 和 Windows IoT 作为其家族成员。早些时候，它包括不再使用的 Windows 9x、Windows Mobile 和 Windows Phone。它是个人计算机中最常用的操作系统。 Windows 的第一个版本由 Microsoft 于 1985 年推出。用于个人计算机的 Windows 的最新版本是 Windows 10。
2. 系统：
macOS 是 Apple Incorporation 提供的一系列专有图形操作系统。它早期被称为 Mac OS X，后来被称为 OS X。它是专门为 Apple mac 计算机设计的。它基于Unix操作系统。它是使用 C、C++、Objective-C、汇编语言和 Swift 开发的。它是个人计算机中仅次于 Windows 的第二大常用操作系统。 macOS 的第一个版本于 2001 年由 Apple 推出。 macOS 的最新稳定版本是 10.15.1，也称为 Catalina。
Windows 和 macOS 的区别：
| WINDOWS | MACOS |
|---|---|
| It was developed and is owned by Microsoft Incorporation. | It was developed and is owned by Apple Incorporation. |
| It was launched in 1985. | It was launched in 2001. |
| It is designed for PC of all companies. | It is specifically designed for Apple mac computers. |
| Current stable version is Windows 10. | Current stable version is mac 10.15.1 (Catalina). |
| It is for workstation, personal computers, media center, tablets and embedded systems. | Its target system type is workstation, personal computers and embedded systems. |
| Computer architectures supported by Windows are IA-32, x86-64, IA-64, ARM, Alpha, MIPS and PowerPC. | Computer architectures supported are x86-64(10.4.7-present), IA-32(10.4.4-10.6.8) and PowerPC(10.0-10.5.8). |
| File systems supported are NTFS, FAT, ISO 9660, UDF, HFS+, FATX and HFS. | File systems supported are HFS+, APFS, HFS, UFS, AFP, ISO 9660, FAT, UDF, NFS, SMBFS, NTFS, FTP, WebDAV and ZFS. |
| Kernel type is Hybrid with modules here. | Kernel type is Hybrid with modules here also. |
| Package management is MSI or custom installer. | Package management is macOS installer. |
| Update management is Windows Update. | Update management is Software Update. |
| The native APIs are Win32 and NT API. | The native APIs are Carbon, Cocoa, Java and BSD-POSIX. |