Hi, I am looking for a MacBook and I have found one with the following specs:
2015/2016
Model A1398
OS X 10.14.2 Mojave
2800 x 1800 Resolution, Retina
2.2 GHz Intel Core i7, Quad Core
16 GB 1600 MHz DDR3 RAM
Intel Iris Pro 1536 MB
1T GB Solid State Hard Drive (NEW!)
WiFi + Bluetooth NEW Third Party Solid State Hard Drive!
It is my understanding that it would support SketchUp. However, this computer has an integrated graphics card (Intel Iris Pro 1536 MB), instead of a dedicated graphics card. Should I be worried about this in regards to SketchUp use?
While there have been numerous reports of integrated graphics problems with SketchUp, they have virtually all been on various flavours of Windows machines.
I have run SU 2015 / 18 / 19 for professional work on my 2014 13" MacBook Pro (Retina): 2.6 GHz 4278U Core i5 / 16GB RAM / Iris 5100 without any major issues.
Since your CPU and GPU are both significantly more powerful, it should run fine. By way of comparison, my current MacBook vs. your proposed one:
For sure, a dedicated graphics card is preferred, and there are caveats on the CPU benchmark (the better comparison would be single-threaded CPU performance), but the larger point remains. Depending on your needs and expectations, you should be quite happy with that choice of Mac.