Here is an excerpt of an answer to a similar question which I believe answers yours. “All MacBook generations after the original MacBook1,1 Core Duo 1.83-2GHz one will run OS X 10.7 (the original MacBook will only run 10.6.8). The three generations shipping in 2007 top out at OS X 10.7.5. Question: Q: Unable to install macOS Catalina 10.15.7 Update Software Update prompts me that an update is available for my Mac. Specifically, the 10.15.7 update and tells me a restart is required. If your Mac isn't compatible with the latest macOS, you might still be able to upgrade to an earlier macOS, such as macOS Catalina, Mojave, High Sierra, Sierra, or El Capitan. To get the latest features and maintain the security, stability, compatibility, and performance of your Mac, it's important to keep your software up to date. Q: Is it worth upgrading a 2009 MacBook to MacOS Catalina via DosDude (program to install Catalina on unsupported Macs)? A: Yes, It definitely is worth it, it works well!
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