Apple's new Mac Mini with M4 chip is on sale for $549, down from $574 with a $25 coupon.The Mac Mini with M4 chip offers 16GB of RAM, front USB-C and headphone ports, and a compact design.For a bigger boost, the Mac Mini with M4 Pro chip is on sale for $1,270, down from $1,370 with a $100 coupon.The M4 Pro chip offers 24GB of RAM, 512GB of SSD storage, and Thunderbolt 5 support for faster data transfer.