A 16-inch MacBook Pro will be unveiled at Sep’19 Apple event, according to IHS Markit.

"We foresee that Apple will release a new product [at the] Sep’19 Apple event if there’s no unexpected development issue," Jeff Lin, Associate Director, Consumer Electronics at IHS Markit, said.

The market research firm expects a new MacBook Pro featuring a 16-inch 4K LCD, running Apple's new Mac OS (Catalina) and a new CPU - probably the 9th generation H series mobile Intel processors, such as Core i9-9980HK 8-core processor. It seems that APple is not moving to OLEDs for its laptops yet, as Hewlett-Packard and Dell do on select laptops.

Apple is also expected to update the 13.3-inch MacBook Pro and Retina MacBook Air with the new MacOS Catalina and new processors in September.

Apple's 15.4-inch MacBook Pro that was released last month is using the same graphics configurable up to Radeon Pro Vega 20 graphics with 4GB of HBM2 memory. It's not clear what future AMD Radeon RDNA ("Navi") graphics Apple could use in the larger MacBook Pro.