Old Macs using mechanical Hard Drives (HDD) sometimes struggle with APFS conversion during the install.
The term “DOW” is not an official Apple term. In the context of macOS patching communities (such as r/MacOS, MacRumors forums, and GitHub repositories), “DOW” likely stands for one of two things: macos catalina 1015 19a583 mac app store dow patched
Thus, “Mac App Store dow patched” translates to: “Mac App Store download patched” – meaning the installer’s download has been modified or a workaround has been applied to bypass standard Apple restrictions. Old Macs using mechanical Hard Drives (HDD) sometimes
Because you’re using a patched download, the App Store will sometimes detect the system version mismatch. Avoid using the App Store for system updates on a patched Catalina system; instead, use the same patcher tool’s “Post-Install” feature to update. The term “DOW” is not an official Apple term
Before addressing the patch, we must understand the target.
If you have downloaded a "patched" Mac App Store file manually from a third-party website, you are taking a risk. The safer method is to let the tool patch the official file:
