1. macOS：
macOS是Apple Incorporation提供的一系列专有图形操作系统。它以前被称为Mac OS X，后来被称为OSX。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。它是仅次于Windows的个人计算机中第二使用最多的操作系统。苹果于2001年发布了macOS的第一个版本。
2. GhostBSD：
GhostBSD是一个免费的开源操作系统，由Eric Turgeon和GhostBSD Team开发。它是一个类似Unix的操作系统，其设计灵感来自TrueOS操作系统。它具有一个称为MATE的默认桌面环境。它专门用于台式机和工作站。先前，它使用了称为GNOME的默认桌面环境。 GhostBSD的第一个版本于2009年发布。它具有带模块的Monolithic内核。
macOS和GhostBSD之间的区别：
| S.No. | MACOS | GHOSTBSD |
|---|---|---|
| 1. | It was developed by Apple Incorporation. | It was developed by Eric Turgeon. |
| 2. | It was launched in 2001. | It was launched in 2009. |
| 3. | It is specifically designed for Apple mac computers. | It is designed for desktops of all companies. |
| 4. | Its target system types are workstation, personal computers and embedded systems. | Its target system types are workstation and desktop. |
| 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 GhostBSD are IA-32 and x86-64. |
| 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. |
| 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. | 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. |
| 12. | 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 GhostBSD are UFS2, ext2, ext3, FAT, ISO 9660, UDF, NFS, ReiserFS, XFS and ZFS. |