Download old versions here.
1.0b1 - 6/24/2019
• Initial release
1.0b2 - 6/24/2019
• Fixed a compatibility issue with Mac OS X version 10.6 through 10.8
1.0b3 - 6/25/2019
• Removed the need to set the boot-args key of your NVRAM before installation
1.0b4 - 6/26/2019
• Fixed a crashing issue some users may experience
1.0b5 - 6/30/2019
• Added an all-new post-install tool, which will now be applied automatically after the system is installed
1.0b6 - 7/1/2019
• Updated the Legacy Video Card Patch
1.0b7 - 7/5/2019
• Added a new patch for legacy Marvell Ethernet controllers
• Added a new patch for legacy Intel Parallel-ATA/IDE controllers
• Updated the Legacy Video Card Patch
1.0b8 - 7/10/2019
• Patch Updater, a program used to update and re-install system patches, is now included with Catalina Patcher
1.0b9 - 7/11/2019
• Software APFS booting implementation is now included, and now no longer requires native APFS BootROM support to run Catalina
1.0b10 - 7/14/2019
• An option to disable the software APFS booter is included, allowing installation of it to be skipped even on machines on which it is required
• Fixed an issue where the kextcache may not get rebuilt after automatic installation of post-install patches
1.0b11 - 7/16/2019
• Updated to add support for Catalina Developer Preview 4/Public Beta 3
1.0.1 - 7/23/2019
• First non-beta release
• All installation methods are now fully implemented
• Added logging functionality in order to pinpoint issues if they do occur
1.0.2 - 7/25/2019
• Fixed an issue with the in-place installation feature
• In-place installation now no longer requires a machine with native APFS BootROM support
1.0.3 - 7/31/2019
• Added support for Catalina Developer Preview 5/Public Beta 4
1.0.4 - 8/3/2019
• Fixed an issue with a portion of the in-place installation feature
• Improved logging verbosity, and error handling
1.0.5 - 8/8/2019
• Fixed an issue with a portion of the in-place installation feature
1.0.6 - 8/9/2019
• Added a new boot disk selection feature for machines that do not support APFS booting natively, allowing you to easily switch between multiple macOS installations on different APFS volumes
1.0.7 - 8/20/2019
• Added support for Catalina Developer Preview 6/Public Beta 5
1.0.8 - 8/21/2019
• Fixed an issue where performing a forced cache rebuild using the Post-install tool may result in an unbootable system
• Added an option to allow users to disable the automatic Post-install patch installation feature for debugging purposes
1.0.9 - 8/28/2019
• Added support for Catalina Developer Preview 7/Public Beta 6
1.1.0 - 8/29/2019
• Improved the macOS installer app downloader implementation
• Fixed a potential prelinkedkernel rebuild issue with the post-install tool
1.1.1 - 9/10/2019
• Added new fixes for Legacy Video Card patches
• Added support for Catalina Developer Preview 8/Public Beta 7
1.1.2 - 9/11/2019
• More improvements made to the Legacy Video Card patches, drastically reducing the size of the application
1.1.3 - 9/23/2019
• Added official support for Catalina Developer Preview 9/Public Beta 8
1.1.4 - 9/24/2019
• Fixed an issue where the kextcache may not get rebuilt properly after applying post-install patches
1.1.5 - 9/25/2019
• Fixed a compatibility issue with the Legacy Video Card Patch and Catalina Developer Preview 9/Public Beta 8
1.1.6 - 10/7/2019
• Added support for the final release of Catalina
• Fixed minor UI inconsistencies
• Fixed an issue with the APFS booter during the installation process
1.1.7 - 10/8/2019
• Fixed an issue where the installation of Catalina would not work properly on machines using an encrypted APFS volume with the APFS booter
1.1.8 - 10/15/2019
• Added installer app support for macOS 10.15.0 w/ supplemental update (app version 15.0.33)
• Added new Volume Control Patch for some iMac systems
• Fixed an issue with the APFS booter implementation
1.1.9 - 10/15/2019
• Fixed an issue with the Legacy Video Card Patch
1.2.0 - 10/19/2019
• Added new SSE4.2 emulator, 'MouSSE' by Syncretic, which fixes the compatibility issue with newer Metal-compatible AMD video cards and the MacPro3,1
1.2.1 - 10/29/2019
• Added support for Catalina version 10.15.1
1.2.2 - 11/1/2019
• Updated the Legacy Video Card Patch, fixing an issue where users may experience crashes when using Notification Center on machines with non-Metal video cards
1.2.3 - 11/2/2019
• Updated the Legacy Video Card Patch, finally fixing the long-present grey Menu Bar and Finder Sidebar issues users would experience in Light Mode with non-Metal video cards. Huge thanks to @ASentientBot and @testheit for their work on developing these patches
1.3.0 - 12/11/2019
• Added support for Catalina version 10.15.2
• This version also supports Catalina version 10.15.3
• Added a feature to detect whether or not certain Mac models need to have newer system firmware installed
1.3.1 - 3/24/2020
• Added support for Catalina version 10.15.4
1.3.4 - 3/25/2020
• Due to major issues with 10.15.4, this version of Catalina Patcher has been reverted to 10.15.3 support only
1.3.5 - 3/28/2020
• Fixed all 10.15.4 issues, 10.15.4 support has now been fully restored
1.3.6 - 3/31/2020
• Fixed an issue where AMFI may prevent some third-party applications from launching in 10.15.4
1.4 - 3/31/2020
• Fixed a minor SIP issue
• Fixed an issue where brightness control and/or Night Shift options would not appear under the Displays pane of System Preferences
1.4.1 - 4/6/2020
• Fixed an issue where permissions for some third-party applications may not work
1.4.2 - 4/16/2020
• Fixed an issue where Safe Mode may not work on some systems
• Added more warnings to alert users if their machine needs a system firmware update in order to boot from APFS volumes
1.4.3 - 4/17/2020
• Added support for creating bootable Recovery partitions
1.4.4 - 5/28/2020
• Fixed compatibility with Catalina version 10.15.5
• This version also supports Catalina version 10.15.6 and 10.15.7