A6150, installation in MAC OS doesn't work

> I followed the procedures from Manual, [...]

   Which "Manual"?

> [...] downloaded software for MAC OS installation [...]

   Version?

> [...] it keeps giving me an error, saying [...]

   Exact message text?  A Web search for that might lead to some useful
information.

> [...] My mac OS is Big Sur.

   I have no actual information, but I would not be amazed if Apple has
(again) tightened the restrictions of its macOS System Integrity
Protection (SIP), and the (old) installer now fails to comply.

   You could test that hypothesis:

      https://developer.apple.com/documentation/security/disabling_and_enabling_system_integrity_protection

   You might find better information sooner in a more appropriate forum:

      https://community.netgear.com/t5/x/bd-p/home-wifi-adapters