macbook pro OS monterey
Folks, I'm in a quandary...
I'm trying to update a MacBook Pro (late 2015) to OS Monterey (was running Mojave). The update tried to install, got the error massage stating that the firmware couldn't be updated.
Reading indicates that I needed an OE Mac SSD installed to get the firmware to update. Bought and installed a 512 GB Apple SSD...
Now, with this SSD installed - the MacBook will run, but will not update the OS beyond Yosemite, and won't open any USB devices I connect, requires a password...
How do I get this **** thing to load up & install Monterey?? (Frustrated)...
MacBook Pro 15″, macOS 10.13