(The requested version of macOS is not available.) I don't understand why even though my computer MacBook Pro (Retina, 13-inch, Early 2013) is supported by this version Big Sur
MacBook Pro 13″, macOS 10.15
Q - " I don't understand why even though my computer MacBook Pro (Retina, 13-inch, Early 2013) is supported by this version Big Sur "
A - macOS Big Sur is compatible with these computers - Apple Support (CA)
if your MBP is indeed an early 2013, then I'm sorry to inform you that it is not compatible with Big Sur. it is the late 2013 MBP that is compatible with Big Sur.
The requested version of macOS is not available.
