If your Mac is using an earlier version of any Mac operating system, you should install the latest Apple software updates, which can include important security updates and updates for the apps that are installed by macOS, such as Safari, Books, Messages, Mail, Music, Calendar, and Photos.

211 words [ 5 Weblinks ] - Last update: 2020-09-15 Page created: 2004-04-03 [SB][MF]

List of Operating Systems

Everybody who would like to know whether an operating system with a certain name really exists or just like to explore all names, this is an excellent place to start with. You will find all types and derivatives of operating systems: commercial, free, open source and closed source. This list does not distinct between the recent stage of development, application purpose, distribution or hardware platform. Operating systems with different version numbers are only considered if they are technically clearly different to each other.

Easily check which versions of mac OS, iOS, iPadOS, or watchOS are compatible with your Mac model or iDevice. Guide includes OS X 10.8.x to macOS 11.0.x.
Here’s how to check which release of the macOS operating system is installed on your MacBook, iMac, Mac Mini, or Mac Pro. To find this information, click the Apple icon on the menu at the top left corner of your screen, and then select the “About This Mac” command.

This list offers hundreds of operating system product and project names, many of them are based on the same operating system with more or less differences in the source code. The most operating systems can be traced down to few development lines and derive from a small amount of system software. This applies especially to Linux distributions with a low number of main distributions and high number of derivatives. Other operating system families are Windows and Unix.

Operating System not found?

You are welcome to inform me about missing operating systems to complete this list further. Who has more informations about operating systems and want to be part of this project is welcome to contact me over e-mail as well.

Operating Systems (613)

2K
86-DOS
A/UX
Acados
ACP (Airline Control Program)
AdaOS
ADMIRAL
Adrenaline
aerolitheOS
Aimos
AIOS
AIX
AIX/370
AIX/ESA
Aleris Operating System
Allegro
AllianceOS
Alpha OS
Alto OS
Amiga OS
Amoeba
Amstrad
AMX RTOS
AneedA
AngelOS
Antarctica
AOS/VS
Aperios
Apollo Domain/OS
ApolloOS
Apostle
Archimedes OS
AROS
ARTOS
Asbestos
Athena
AtheOS
AtomsNet
Atomthreads
AuroraOS
AutoSense OS
B-Free
Bada
BAL
Banyan VINES
Basic Executive System
BeIA
BeOS
Beowulf
BKY
BlackBerry OS
BlueEyedOS
BOS
BOS1810
BoxOS
BPMK
bpmk
BRiX
BS600
BS2000
BSDi
BugOS
Calmira
CCP (Computer Control Program)
CDOS
Cefarix
C Executive
Chaos
ChibiOS
Chimera
Chippewa OS
Choices
Chorus
Cinder OS
Cisco IOS
Clicker32
CMW+ (SCO)
COBRA
Coherent
CONSENSYS
Contiki
ConvexOS
Cos
Cosy
Counterpoise
CP/K
CP/M
CP/NET
CP/Z
CPF (Control Program Facility)
Cromix
Cronus
CSOC
CTOS
CTSS
CX/SX
Cygnus
DAC
Darwin
Data General
DC/OSx
DCP
Degenerate OS
Delitalk
DELL UNIX
Deming OS
DEMOS
DesktopBSD
DESKWORK
DG/UX
DIGITAL UNIX
dingOS
DK/DOS
DLD
DNIX
Domain OS
DOS
DOS2
DOS 50
Dosket
dr'ex
DR-DOS
Drops
Drywell OS
DS-OS
DTOS
DVIX
DYNIX Unix (Sequent)
ECL-3211
eComStation
eCos
EduOS
EGOS
ekkoBSD
Elate
ELKS
Elysium
EOS
EP/IX
EPOC
ERaMS
ERIKA
EROS
ESER
ESIX
ESKO
Eumel
EuNIX
Exopc
ExOS
Express
Famos
FDOS
Fiasco
Flamethrower
FlashOS
FlexOS
FlingOS
FLP-80 DOS
Flux
Flux-Fluke-Flask
FMS
Forth
FortiOS
FreeBSD
FreeDOS
FreeDOWS
FreeVMS
Frenzy
Fuchsia
FullPliant
FunatixOS
FxOS
GazOS
GCOS
GECOS
GeekOS
Gemini Nucleus
Genera
GEORGE
GEOS
GM OS
GNU Hurd
GNUstep
Go
Goah
Gould OS
Grasshopper
GUIDE
HA-MSP
Hactar
Harmony
Haïku
Helios
HES
Hive
HongMeng OS
HOPE
HP-87 OS
HP-UX
HT-11
Hurd
Hurricane
HydrixOS
i5/OS
IBM PC-DOS
IBSYS
Icaros Desktop
ICL Unix
Immunix
Inferno
INMOS
INTEGRITY RTOS
Iridium OS
IRIX
iRMX
IRTS
ISC (Interactive)
ISIS
ISSL
ITRON
ITS
JAMB
JavaOS
Jbed
JeniOS
Jeo-OS
Jibbed
JOS
JTMOS
JUNOS
JxOS
KAOS
Kaspersky OS
Katix
Kea
Kerberos
KeyKOS
KolibriOS
KOS
KRONOS
KROS
KRUD
Kylin
L4
L13Plus
LainOS
LAN Manager
LDOS
LegOS
leJOS
Linux
Lisa OS
LTSS
LynxOS
Mach
Mac OS 8
Mac OS 9
Mac OS X
MANOS
MaRTE OS
Maruti
Masix
Master
Maverick OS
MBOS
MCP (Master Control Program)
MDOS
MenuetOS
Merlin
Micriµm
MICRODOS
MicroVMS
MidnightBSD
MikeOS
Minima
Minix
Minoca OS
Minux
Miranda
Miray µnOS
MITE 80/IOS
MK++
ML
ModulOS
Monitor
MOPS
MorphOS
MOS
MOSIX
MPE/iX
MPE OS
MRT1700
MS-DOS
MSOS
MT809
Multics
Mungi
MUTOS
muVinix
MVS
Möbius
NachOS
NCR Unix
NEC DOS
NECUX
Nemesis
NeOS
NetBSD
Netware
NewDeal
NEWDOS
NewOS
NEWS-OS
Newton OS
NexentaOS
NeXTStep
NextworksOS
Nexus
Nimbus
NintendOS
Node OS
NOS
NOS/BE
NOS/VE
Nova
Novell DOS
NS/GDOS
NSK
NTDIOS
Nucleus
Oaesis
Oasis
Oberon
Objex
Odin
Omega 4
OnCore
On Time RTOS-32
Opal
OpenBeOS
OpenBSD
OpenDarwin
OpenRavenscar
OpenServer
OpenSolaris
OpenVision
OpenVMS
OppcOS
OS-2
OS-9
OS-C
OS/2
OS/2 Warp
OS/9
OS/360
OS/390
OS/400
OS/ES
OS/M
OS4
osCAN
OSE
OSF/1
Osx
OSx16
OZONE
PAKOS
Palm OS
PAPL
Paramecium
ParixOS
Paros
PaulOS
P BASIC
PC-BSD
PC-DOS
PC-MOS/386
PC/M-System
PDOS
PEACE
Pebble
Pegasos
PETROS
Phantom OS
Phos
PikeOS
PIOS
PizziOS
Plan 9
Plex86
PM_SZ_OS
PocketPC 2003
PowerMAX
PowerOS
PowerSX
PowerUX
ProDOS
Prologue
Proolix
ProOSEK
PSOS
pSOSystem
PSU
PTS DOS
PublicOS
PURE
QDOS
QNX
Quadros
RadiOS
RBASIC
RCOS
RCOSjava
RDOS
ReactOS
REAL-32
Realogy Real Time Architekt
REBOL-IOS
Redox
ReWin
REX-80/86
REXX/OS
RHODOS
RISC OS
RMOS
RMS 68k
Roadrunner
Rocket
Rome
ROME
RSTS/E
RSX-11
RT-11
RTEL
RTEMS
RT Mach NTT
rtmk
RTMX
RTOS-32
RTOS-UH
RTS-80
RTX
RTXDOS
RxDOS
S.Ha.R.K
Sanos
SCO OpenServer
SCOPE
ScorchOS
ScottsNewOS
Scout
SCP
SCP (System Control Program)
SCP-IBE
Self-R
SeOS
Sequent
SEVMS VAX
Shark
SharpOS
ShawnOS
SIBO
Sinclair
Sinix
SINTRAN III
SkyOS
Slikware
sMultiTA
SOBS
Solaris
Solar_OS
Solbourne UNIX
SOS
SP6800
Spice
Spice/MT
SPIN
Spinix
SPOX
Spring
Squeak
SSP (System Support Program)
STAR-OS
STARCOS
Starplex II OS
Sting
StreamOS
Subsump
SUMO
SunMOS
SunOS
SunriseOS
SuperDOS
SVM
SVR
Switch OS
Syllable
Symbian OS
SymbOS
Symobi
Symphony OS
Synapse
System 6 (Mac OS)
System 7 (Mac OS)
System V Release
Tabos
TABOS
TalOS
TAOS
TENEX
THE
Thix
ThreadX
ThrillOS
TI-99 4A
TinyOS
TIS APL
TNIX
TOPS-10
TOPS-20
Topsy
Tornado
Torsion
TOS
TPF (Transaction Processing Facility)
TriangleOS
Tripos
TRON
TRS-DOS

List Of Operating System For Mac