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.[1][2]
To install copies of macOS without updated certificates, change the Mac's system clock to sometime prior to 24 October 2019 before attempting installation, and reset it to the current date afterwards. If the Mac doesn't have an existing operating system installation, this may be done from the installation environment by clicking Utilities → Terminal, then entering date 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.
| Version | Build | Release Date | Download URL | SHA1 Hash | File Size | Documentation | Notes |
|---|---|---|---|---|---|---|---|
| 10.15 | 19A583 | 7 October 2019 | ? | ? | ? | Security Notes | Initial release to the Mac App Store |
| 19A602 | 15 October 2019 | ? | ? | ? | Supplemental update release | ||
| 19A603 | 21 October 2019 | ? | ? | ? | Reissued supplemental update release | ||
| 10.15.1 | 19B88 | 29 October 2019 | macOSUpd10.15.1.dmg | 69560cf9196cc9d885bc21ea62cdd0745b14468f
|
4,528,032,956 | Release Notes Security Notes |
|
| 10.15.2 | 19C57 | 10 December 2019 | macOSUpd10.15.2.dmg macOSUpdCombo10.15.2.dmg |
d5e4e420e4a187920db37830053332b0805cf11df33c39737ee63e2600bc4239d377382eb99d0ed8
|
3,041,652,339 4,594,197,852 |
Release Notes Security Notes |
|
| 19C58 | |||||||
| 10.15.3 | 19D76 | 28 January 2020 | macOSUpd10.15.3.dmg macOSUpdCombo10.15.3.dmg |
ebbbcab13e5435c2c5fc25bc09f8187c60bab1b2a11c194e6ab958913866a2e7cd2f733c1ba36ab1
|
2,990,355,136 4,590,087,237 |
Release Notes Security Notes |
|
| 10.15.4 | 19E266 | 24 March 2020 | macOSUpd10.15.4.dmg macOSUpdCombo10.15.4.dmg |
212ea603c186f001b388b432a5e94a41546e99c0d7764f5f920f7b235b5c19a89aa5a72aa2ab8de4
|
2,995,307,625 4,734,202,277 |
Release Notes Security Notes |
|
| 19E287 | 8 April 2020 | macOSUpd10.15.4Supplemental.dmg | 8d2223e580952164a087f4db2637323365e5a495
|
1,017,140,252 | |||
| 10.15.5 | 19F96 | 26 May 2020 | macOSUpd10.15.5.dmg macOSUpdCombo10.15.5.dmg |
373aa6e943faea26ee42113a57fda83d36ac26abdd19f615be689fa35a9bd7256facd1a01f55839e
|
3,004,050,251 4,803,441,484 |
Release Notes Security Notes |
|
| 19F101 | 1 June 2020 | macOSUpd10.15.5Supplemental.dmg | b1c55e859837a1f5867b8b783c4caaba5c3d2f6e
|
1,204,968,101 | Security Notes | ||
| 10.15.6 | 19G73 | 15 July 2020 | macOSUpd10.15.6.dmg macOSUpdCombo10.15.6.dmg |
1a7f948f3229a620c8346e70bec2f6bd8e35df8f4e7889f310415361d68f46bb9795f698a29f9266
|
2,997,134,218 4,823,622,242 |
Release Notes Security Notes |
|
| 19G2021 | 12 August 2020 | macOSUpd10.15.6Supplemental.dmg | 0fe45551c701d53237601f50c92d476d1ba8065d
|
2,823,838,090 | |||
| 10.15.7 | 19H2 | 24 September 2020 | macOSUpd10.15.7.dmg macOSUpdCombo10.15.7.dmg |
dc8577a98a4db78f8be0a9c336711e047c1aa01f823e7636cb358daf6eff01ec8b4649a387e5acd5
|
2,859,603,750 4,823,637,251 |
Release Notes Security Notes |
|
| 19H4 | 27 October 2020 | ||||||
| 19H15 | 5 November 2020 | macOSUpd10.15.7Supplemental.dmg macOSUpd10.15.7.dmg |
23a740a2146e976a2bf7752195a4f744c40f91875e97455bd82981f0c64b9942715f786a07fb8fd4
|
1,222,040,585 2,859,666,257 |
Security Notes | ||
| 19H524 | 9 February 2021 | SecUpd2021-001Catalina.dmg | e7c45a499b742009e4cbf84ecb49efd1b32ea947
|
1,350,059,291 | Security Notes |