X-Plane 11 has been released. Please check out the latest report: Installing and Trying the X-Plane 11 Free Demo!

The official website has released two consecutive posts discussing the hardware requirements for X-Plane 11. X-Plane 11 System Requirements introduces the Minimum Hardware Requirements as

CPU: Intel Core i3, i5, or i7 CPU with 2 or more cores, or AMD equivalent. (Dual-core CPUs slower than 3 GHz should try the demo before purchasing.) Memory: 8 GB RAM Video Card: a DirectX 11-capable video card from NVIDIA, AMD or Intel with at least 512 MB VRAM

My own machine is

iMac 27-inch, Mid 2011， CPU is 2.7GHz Quad-Core Intel Core i5, Memory is 12G, Graphics driver is AMD Radeon HD 6770M Graphics Processor (512MB GDDR5 Memory)

which basically just meets the minimum requirements, so I estimate it will barely run.

Additionally, the Recommended Hardware Requirements are:

CPU: Intel Core i5 6600K at 3.5 ghz or faster Memory: 16-24 GB RAM or more Video Card: a DirectX 12-capable video card from NVIDIA, AMD or Intel with at least 4 GB VRAM (GeForce GTX 1070 or better or similar from AMD)

Some Notes on X-Plane 11’s System Requirements provides some supplements, such as XP11 only supporting 64-bit operating systems and Plugins/Addons, not supporting Windows XP and Vista, on Mac only supporting Yosemite and above, graphics cards AMD HD2000 series and above, and recommending CPUs like Intel i5 6600K, etc.

It looks like I also need to start saving money for some equipment investment for X-Plane 11…

Also, X-Plane 11’s Default Aircraft mentions the default aircraft, which are fewer compared to XP10: Schleicher ASK 21 Beechcraft Baron 58 Boeing 747-400 Cirrus Vision SF50 Beechcraft King Air C90 Cessna 172SP