1. 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。苹果公司于 2001 年推出了 macOS 的第一个版本。
2. FreeBSD：
FreeBSD 是 FreeBSD 项目提供的免费开源操作系统。它是在两个类 Unix 操作系统 Berkeley Software Distribution (BSD) 和 Research Unix 的基础上设计的。它与 Linux 操作系统非常相似。它是早期著名的操作系统之一，但与其他操作系统相比，现在使用较少。 FreeBSD 的第一个版本于 1993 年推出。
macOS 和 FreeBSD 的区别：
| S.No. | MACOS | FREEBSD |
|---|---|---|
| 1. | It was developed and is owned by Apple Incorporation. | It was developed and is owned by The FreeBSD Project. |
| 2. | It was launched in 2001. | It was launched in 1993. |
| 3. | It is specifically designed for Apple mac computers. | It is not designed for personal computers. |
| 4. | Its target system types are workstation, personal computers and embedded systems. | Its target system types are server, workstation, NAS and embedded systems. |
| 5. | Computer architectures supported by macOS are x86-64(10.4.7-present), IA-32(10.4.4-10.6.8) and PowerPC(10.0-10.5.8). | Computer architectures supported by FreeBSD are IA-32, x86-64, ARM, MIPS and PowerPC. |
| 6. | Its kernel type is Hybrid with modules. | Its kernel type is Monolithic with modules. |
| 7. | Its package management is macOS installer. | Its package management is Port collections/packages. |
| 8. | Its update management is Software Update. | Its update management is by source or network binary update. |
| 9. | Its native APIs are Carbon, Cocoa, Java and BSD-POSIX. | Its native APIs are BSD/POSIX. |
| 10. | It has preferred license of Proprietary, APSL and GNU GPL. | It has preferred license of BSD. |
| 11. | File systems supported by macOS are HFS+, APFS, HFS, UFS, AFP, ISO 9660, FAT, UDF, NFS, SMBFS, NTFS, FTP, WebDAV and ZFS. | File systems supported by FreeBSD are UFS2, ZFS, ext2, ext3, FAT, ISO 9660, UDF and NFS. |
| 12. | The non-native APIs supported by its subsystems are Toolbox, Win16 and Win32. | The non-native APIs supported by subsystems are Mono, Java, Win16, Win32 and Linux. |