EmuELEC is not a "one size fits all" OS. It is compiled specifically for System-on-Chips (SoCs). Here are the officially supported platforms, sorted by architecture:
EmuELEC does not support x86 PCs, Raspberry Pi (different branch – use RetroPie or Lakka), or Rockchip RK3588 (no stable GPU driver for this use case yet). emuelec supported platforms best
Before Rockchip dominated, was the king. These are the TV box chips. EMUELEC supports them, but with caveats. EmuELEC is not a "one size fits all" OS