Steam is available for OS X on apple machines. The vast majority use MacBook laptop which have Intel integrated graphics.
The MacBook A1534 in the studio is a basic ultra low power i5 equivalent with 8GB of memory and it comes with a 256GB SSD.
Given the lower power settings for MacBook does limit gaming to some extent. By comparison the Lenovo laptops here are designed for higher power operation so they need bigger batteries and power supplies.
The Intel 5300 graphics are rudimentary. It features 192 shading units, 24 texture mapping units and 3 ROPs. The GPU is operating at a frequency of 100 MHz, which can be boosted up to 900 MHz.
Playing games on a MacBook are best with the machine connected to the charger unit. This can provide some addition current so that the machine can handle extended gaming. The MacBook does tend to get a bit warm but it thermally stable.
The Steam client for OS X has been available for a very long time. There are a wide number of games in the Steam store now for the MacBook. The PC has a vast number of games available.
Steam does show if the game is compatible in system requirements but they might want to modify the store a bit to show compatibility.
The Apple xCode development package is able to target the whole Apple ecosystem so games can be ported fairly easily.
- iPhone SE
- iPhone 7
- iPad Mini 2
- Macbook A1534
- Watch series 3
Given the range of hardware, developers have to consider a range of UI issues. The watch has a very small screen which limits the type of app that can be developed.
The iPhone and iPad have roughly the same level of hardware which simplifies the design but aspect ratios and high DPI screens have to be considered.