Enterprise is a good example of a modern apple developed specifically for disease resistance. The parentage is complex, but includes McIntosh, Golden Delicious, and Rome Beauty - as well as the ubiquitous crab apple Malus floribunda, the source of the vital gene for scab-resistance. It is probably closest to McIntosh in overall appearance, although this is not a "Mac" style apple and it does not have the vinous flavor associated with Macs.
The apples are a glossy red color, ripening in late October. They can be stored for 3-6 months in a domestic fridge. The skin is quite thick and tough. Whilst Enterprise is good for eating fresh, it is perhaps better as a cooking apple where its tart flavor can be used to advantage.
Being easy to grow and with versatile uses, Enterprise has rapidly established itself as a popular garden apple variety.
More details about this variety are available on the joint Purdue University / Rutgers University / University of Illinois website - click here.