I don't think so, the lowest from 2026 was still 2.66 PFlop/s, so they'd need thousands of Mac Minis. The M4s in the Minis aren't on a different level than the Xeons in those old clusters (outside of power consumption), even if we let the Macs use FP32.

Pretty sure not, especially since it requires 64-bit floating-point, so the GPU cores don't help. #500 right now is 2PF. One Mac won't do anywhere near 20 TF. Google tells me you can get 350GF of DP from one 10-core M4, so you might need 10,000 to get there. Then there's the network...