Often with the release of the new version of macOS, Apple leaves some old Macs out of the picture. And with the release of Catalina it happened: now devices of 2012 and newer are supported. At the same time, obviously, in performance, some 2011 models (for example, the same MacBook 15 “) are faster than simple MacBooks with Core m processors without active cooling, so trimming support is definitely not related to the performance of older models.
And third-party developers confirmed this by creating a tool called DosDude Catalina Patcher, which allows you to unofficially install the latest version of macOS on many unsupported Macs (the entire list is on the site). It is worthwhile to understand that some functions (for example, Sidecar) may not work, and the system itself may be unstable or slow.
The instruction itself is not very complicated. To get started, download the patcher itself from the link above:
Right-click on the Catalina Patcher application and select the “Open” option, then in the program itself, double-click the “Continue” button:
Select the option “Download copy”:
Click on the “Start Download” button. The image itself weighs 7 GB, so downloading it will take some time:
After downloading, plug in your Mac pre-formatted flash drive in Mac OS Extended (journaled) to your Mac. In the installation methods, select the option “Create downloadable installer“:
Select your flash drive in the list and click on the “Start” button, then wait until the image is flooded with the flash drive.
Next, you need to reboot and after turning on the sound, hold down the Option button to get to the standard menu where you can reinstall macOS. If your Mac currently has a version of macOS prior to High Sierra or Mojave installed, you need to format the drive to the APFS file system before installing Catalina. To do this, go to Disk Utility, select the system volume and click on the “Erase” option, then select the APFS format. If your drive already runs on APFS, just select “Reinstall macOS” in the “macOS Utilities” window and follow the instructions to install the new version of macOS on your Mac:
It’s worthwhile to understand that Apple may release an update for Catalina that will make the patcher impossible, so this method is not ideal, but it still allows you to try the latest version of the OS on older Macs.