Macbook Pro 2009 17" -nvram is not supported on this system

The original HD on the MBP 2009 crashed and I had replaced with an SSD and installed a few Linux distributions on it. They all run fine with no issues.

Recently I wanted to run MacOS, beyond El Capitan and tried Sierra (dosDude patcher) as well as Monterey (OCLP) . Both failed to boot darwin. Each of them were hanging in different places.

So I thought of installing `El Capitan` through USB and that did not go well (It will spend 10 minutes in the installer copying files and finally will say it cannot do it, when in fact it never copied any files.).

I finally managed to create an USB out of Snow Leopard DVD that came with the MBP. I installed SL fine with with that USB. The SL installer did warn me that it cannot write the startup disk information at the end of copying, but I managed to boot it with the Mac Boot picker (using the Option key)

When I manually ran `bless --info` on the booted SnowLeopard it reported that

Could not find IODeviceTree:/options Cant's access "efi-boot-device" NVRAM variable % nvram -p nvram: nvram is not supported on this system. 

While running OCLP, I had used the option `Reset NVRAM` couple of times. I am not sure if that had messed up system. Any help of getting the nvram populated would be appreciated.

Thanks for your time in advance