The latest release of Mac OS X El Capitan beta for developers includes references to two new pieces of hardware from Apple: a 4K version of the 21.5-inch iMac and a new multi-touch Bluetooth remote control.
In October last year, Apple revealed a new iMac with Retina 5K Display, which featured a 14.7m pixel display and a resolution of 5,120 x 2,880.
According to the code contained in the new Mac OS X El Capitan revealed at WWDC in recent weeks, there is a reference to a device with 4096 x 2,304 Retina, which is a 4K reference.
The beta also contains references to four new AMD Radeon R9 processors, indicating additional Mac models or 4K iMac upgrade options, according to 9to5Mac.
El Capitan’s beta indicates Apple is working on a new Bluetooth Remote Control with reference to Force Touch support that also supports infrared and multi-touch.