Use this property to set and retrieve the name of the hosting operating system property.
The HostOS, along with the hosting app and viewport size, determines which baseline will be used as the basis for comparing checkpoint images. By default, the hosting OS is undefined. The Test Manager displays this value as the OS column.
NSString* configval; // give relevant initial value config.hostOS = configval configval = config.hostOS
(copy, nonatomic) NSString *hostOS
The value to be used for the Host OS Property.