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This occurs when the copy of the macOS Catalina Installer app used has gotten corrupted somehow. To rectify this, use Catalina Patcher to download a fresh copy of the Catalina installer, then re-create an installer volume and/or retry the installation.
- Changelog
Download old versions here. 1.0b1 - 6/24/2019 ... 1.0b2 -...
- Changelog
20 Σεπ 2023 · Step 1 Download the Patching Tool. macOS Catalina Patcher can be downloaded from http://dosdude1.com/catalina/ Before beginning, ensure your model is compatible under the "System Compatibility" tab on the page. Most 2008 to 2011 Macs are compatible with the patching tool.
Added second warning to alert users if their machine needs a system firmware update to boot from an APFS volume
9 Ιουν 2024 · This patcher will allow you to install Catalina on any Mac (even unsupported Macs) as long as it is running 10.10 Yosemite and the patched firmware or 10.13 High Sierra. It will also allow the installer to work on supported Macs.
3 Ιουν 2019 · macOS Catalina Patcher . To install on your machine, you can download and run @dosdude1 's macOS Catalina Patcher application, which will let you download a copy of the latest...
If you have NOT previously installed High Sierra, you can download and install this package to install the latest BootROM version. When installing, ensure your system is plugged in to power, or the update will not be installed.
Credit goes to u/imtherealshady97 for providing us with this guide on how to install the Catalina Supplemental Update on patched Macs. I'm reposting his instructions with some added details for those who need it. You will need: • Your Catalina Patcher USB (hold on to this everytime you update)