iM 4,1-14,4 iMac4,2 OCLP Monterey

[flang]

can the iMac4,2 core duo 1.83G be updated to Monterey with OCLP?
Or will be just too painfully slow?
My brother refuses to buy even a used Mac of more recent vintage yet is always complaining that Safari, Firefox no longer loads this or that.
It is otherwise OEM ram and 80G 7200 rpm.
He also still has a "Jetson" iMac aka CRT from '99.

 

[theMarble]

It's not a case of speed, you physically can't even get Lion (10.7) onto an iMac4,2 due to it having a 32-bit CPU (the Core Duo). Even if you did upgrade the CPU to a 64-bit Merom-based Core 2 Duo, it still has 32-bit firmware, no SSE4.2 and the GMA 950 graphics chip, none of which are compatible with any semi-modern release of OS X/macOS.

It's only useful as a retro 10.4 (or XP) machine for very basic tasks, due to the GMA 950 graphics chip, which was much slower than almost all of the later PPC Macs (which had ATI or NVIDIA chips).