Taiwan Semiconductor Manufacturing Co has begun producing advanced four-nanometer chips for U.S. customers in Arizona, Commerce Secretary Gina Raimondo told Reuters, a milestone in the Biden administration's semiconductor efforts.

Apple is already testing the initial batch of processors produced for its devices by TSMC Arizona, reports Nikkei Asia. To begin with, the tests intend to compare the Arizona output to see if the quality is similar to chips produced in TSMC’s cutting-edge fabs in Taiwan.

TSMC's chip foundry in Arizona is not just making one Apple chip, as a second Apple design is reportedly now in production at the facility.

Apple is in the "final stages" of verifying the 'Made in America' iPhone chips in the TSMC Arizona factory so it can start using them.

Apple announced that it would start using US chipsets from TSMC’s Arizona plant in the future. TSMC said that a third of the chips made at the Arizona plant will be for the iPhone maker. At the time,

The first US plant to make A-series chips for Apple devices is expected to begin mass production as early as this quarter, says a new report. It implies that test production by TSMC has already begun,