Releases of Mac OS X prior to Mavericks were paid upgrades. As such, full installers mostly do not exist for these versions. Apple made exceptions for Mac OS X Lion and OS X Mountain Lion, which were released as a free download on the Apple Support website on 2 July 2021[1][2]
. On 24 October 2019 and 10 February 2015 , in preparation for an Apple Software Update certificate expiring causing installer packages to display an integrity error and refuse to install, Apple reissued many updates, signed with a new certificate.To install copies of macOS without updated certificates, change the Mac's system clock to sometime prior to 24 October 2019date 1001000019
to set the date to midnight on 1 October 2019 . Press ⌘Q to quit Terminal and return to the installer.
Most downloads are a patch updater (upgrading directly from the previous version), or combo updater (upgrading from any earlier version in the same major release). To perform a clean installation of macOS, use a full release build.
OS X Mountain Lion is the first release to move server components from a separate operating system release, to an OS X Server application installed on top of the operating system.
- Apple Store product listing (no longer available as of November 2023 )[3]
- App Store listing (no longer available)
Version | Build | Release Date | Download URL | SHA1 Hash | File Size | Documentation | Notes |
---|---|---|---|---|---|---|---|
10.8 | 12A269 | 25 July 2012 | Paid Release | — | — | — | |
10.8.1 | 12B19 | 23 August 2012 | OSXUpd10.8.1.dmg[dead link] | ? | ? | Release Notes [Archived 2014-08-13 at the Wayback Machine] | |
10.8.2 | 12C54 | 19 September 2012 | OSXUpd10.8.2.dmg[dead link] OSXUpdCombo10.8.2.dmg |
?ba9c7f07abc9da1c8bb1798f5756baa3941beefd
|
? 697,635,080 |
Release Notes [Archived 2014-09-23 at the Wayback Machine] Security Notes |
|
12C60 | 4 October 2012 | OSXUpd10.8.2Supp.dmg | c81731a9c562eb06f86efbfb55e3cc9523ad9730
|
27,876,466 | Release Notes [Archived 2014-09-23 at the Wayback Machine] | ||
12C2034 | 23 October 2012 | ? | ? | ? | — | ||
12C3104 | 29 November 2012 | OSX10.8.2SupplementalUpd2.0.dmg | 75954a6493558fb468b27d2859f1437a2e17efde
|
1,197,722 | — | Update reissued due to "Volume does not meet requirements for this update" error. | |
10.8.3 | 12D78 | 14 March 2013 | OSXUpd10.8.3.dmg[dead link] OSXUpdCombo10.8.3.dmg |
?0222e5060740a80f846559d4f708b84574042a85
|
? 832,220,952 |
Release Notes [Archived 2014-10-10 at the Wayback Machine] Security Notes |
|
10.8.4 | 12E55 | 4 June 2013 | OSXUpd10.8.4.dmg[dead link] OSXUpdCombo10.8.4.dmg |
?2d5f272dc19ddf1733eb22cf045cf7ae9f627ea7
|
? 849,326,635 |
Release Notes [Archived 2014-08-29 at the Wayback Machine] Security Notes |
|
12E3067 | 10 June 2013 | — | — | — | — | Initial release for MacBook Air (Mid 2013) | |
12E4022 | 25 September 2013 | Initial release for iMac (21.5-inch, Late 2013) and iMac (27-inch, Late 2013) | |||||
10.8.5 | 12F37 | 12 September 2013 | OSXUpd10.8.5.dmg[dead link] OSXUpdCombo10.8.5.dmg |
?9a213a75d4f84b9bed497b1b5ebd6d807d4082b6
|
? 872,364,619 |
Release Notes [Archived 2014-09-12 at the Wayback Machine] Security Notes |
|
12F42 | 24 September 2013 | ? | ? | ? | Release Notes [Archived 2014-09-12 at the Wayback Machine] Security Notes |
||
12F45 | 3 October 2013 | OSXUpd10.8.5Supp.dmg | 5b10d728f5043e7b056e24f30596fa34031d859d
|
19,662,726 | Release Notes [Archived 2014-09-12 at the Wayback Machine] Security Notes |
||
2 July 2021 | InstallMacOSX.dmg | 4b9bc933f50abe824b93ba9eebd8f57f1609ccdb
|
4,720,237,409 | DL2076 | Free re-release of Mountain Lion. Does not have updated installer certificate, so system clock must be set earlier than 24 October 2019 | to install.