Arnold 4.2.16.2 reduced the minimum requirement to SSE4.1

The latest Arnold 4.2.13.0 raises the minimum CPU requirements from SSE3 to SSE4.2:

• CPUs need to support the SSE4.2 instruction set

If you want to check whether an older machine supports SSE, here’s a few suggestions:

• Google your CPU and “SSE”
• Windows: Download and run coreinfo -f
• OSX: Run sysctl -a | grep machdep.cpu
• Linux: Check /proc/cpuinfo