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I've seen an article that seems to apply, but has a different error code. Anyone seen this code?
I was trying to install an upgrade to MacOS from Sierra to whatever is supported on an older Mac Pro (2013).
Earlier Mac models
Sierra upgrades to High Sierra are supported, and Mojave if you have the correct graphics card.
See my tips:
High Sierra upgrading tip - Apple Community
indicates this may be because too new a system was installed.
And if you have the so-called trash can Mac Pro desktop (black cyllinder) it can upgrade at least to Catalina if not Monterey, but 64 bit application upgrade is necessary.
Error code -5101F?
