Bloomberg’s Mark Gurman has confirmed that Apple is nearing the introduction of what appears to be a refreshed Mac Studio model, indicating that it could be announced at WWDC next week.
On Twitter, Gurman explained that the new Mac in question is codenamed “J475.” The current Mac Studio is codenamed “J375,” suggesting that the new machine is indeed a next-generation Mac Studio model.
Earlier this week, Gurman reported that Apple is testing two desktop Macs equipped with the M2 Max and M2 Ultra chips. The M2 Max was released in January upon the launch of the latest 14- and 16-inch MacBook Pro models, but the M2 Ultra chip is new and would succeed the M1 Ultra chip that Apple uses in the Mac Studio.
Read more at MacRumors.com

