Apple's M4 Mac mini, particularly the base model priced at $599, has become increasingly difficult to purchase, marked as 'currently unavailable' for the first time. Over recent months, various configurations of the Mac mini and Mac Studio have shifted from immediate availability to extended shipping times ranging from 5 to 12 weeks. This trend suggests a potential hardware refresh, as Apple typically experiences such availability issues before launching new models. Notably, while the M4 Mac mini faces these challenges, other models, such as the M4 iMac, remain readily available for quick delivery. The situation does not appear to stem solely from supply chain issues, as new MacBook Pro models with high specifications are still being shipped within a few weeks. This scenario hints at the possibility of upcoming M5 upgrades for Apple's desktop computers.