xcode 10.0 - hardware system requirements for ios / android testing

Hello,

I have an environment running xcode + appium + Android Studio

I am trying to run at least 2 x IOS and/or Android simulations at the same time however the system seems to lock up and the simulations crash, it seems to be due to lack of system resources.

The simulation works with just 1 x IOS or Android test running.

current system specs:

OSX 10.13.6 Mojave

Intel i5 6500 @3.2ghz

16Gb 1867 Ram

1TB 7200 RPM HDD

AMD R9 M380 2048MB gpu

Software versions:

Xcode 10.0

Android Studio 3.3.1

Appium 1.10.0 Desktop

Ideally i'd like to run 4 x simulators at the same time

2 x android and 2 x IOS

Any information on what hardware or imac model would be needed for multiple simulators to run without issue, it would be greatly appreciated!

Cheers,