First Mac mini redesign in almost 15 years highlights how good the insides are. The M4 Mac mini. Credit: Andrew Cunningham The M4 Mac mini. Credit: Andrew Cunningham The Mac mini will celebrate its 20th birthday in January. And I think the M4 version of the Mac mini is far and away the most appealing one the company has ever made. When it was introduced during the white plastic heyday of peak iPod-era Apple, the Mac mini was pitched as the cheapest way to buy into the Mac ecosystem. It was $499....