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常用的操作系统。苹果于2001年发布了macOS的第一个版本。
2. AIX：
AIX是IBM提供的一系列专有操作系统。 AIX代表Advanced Interactive eXecutive。最初，它是为IBM RT PC RISC工作站设计的，后来被用于各种硬件平台，例如IBM RS / 6000系列，基于PowerPC的系统，System-370大型机，PS-2个人计算机和Apple Network Server。它是五个具有Open Group UNIX 03标准认证版本的商业操作系统之一。 AIX的第一个版本于1986年发布。
macOS和AIX之间的区别：
| S.No. | MACOS | AIX |
|---|---|---|
| 1. | It was developed and is owned by Apple Incorporation. | It was developed and is owned by IBM. |
| 2. | It was launched in 2001. | It was launched in 1986. |
| 3. | Its target system types are workstation, personal computers and embedded systems. | Its target system types are Server, NAS and workstation. |
| 4. | 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 AIX are POWER, PowerPC-AS, PowerPC and Power ISA. |
| 5. | Its kernel type is Hybrid with modules. | Its kernel type is Monolithic with modules. |
| 6. | Its package management is macOS installer. | Its package management is installp and RPM. |
| 7. | Its update management is Software Update. | Its update management is Service Update Management Assistant (SUMA). |
| 8. | Its native APIs are Carbon, Cocoa, Java and BSD-POSIX. | Its native APIs are SysV/POSIX. |
| 9. | It has preferred license of Proprietary, APSL and GNU GPL. | It has preferred license Proprietary. |
| 10. | The non-native APIs supported by its subsystems are Toolbox, Win16 and Win32. | The non-native APIs are not supported by its subsystems. |
| 11. | It has default GUI ‘on’. | It does not have default GUI ‘on’. |
| 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 AIX are JFS, JFS2, ISO 9660, UDF, NFS, SMBFS and GPFS. |