To reproduce:
1. Open attached project;
2. Make sure Graphics API is set to Metal;
3. Build and run "Compute" scene on iOS devices.

Expected result: scene loads, game object with Compute shader is rendered correctly.
Actual: game object is not rendered (iPhone SE, iPad Mini 4, iPad 5th gen) or rendered incorrectly (iPhone X, iPad Pro), errors are thrown:

-iPhone X, iPhone SE, iPad 5th gen:
Execution of the command buffer was aborted due to an error during execution. Discarded (victim of GPU error/recovery) (IOAF code 5);

-iPad Mini 4:
Terminating app due to uncaught exception 'APINotSupported', reason: 'API is not supported'
* First throw call stack:
(0x181efad8c 0x1810b45ec 0x181efa9f0 0x1a6f4d9a8 0x1008a4608 0x100b9c198 0x1008aa1fc 0x100b9f5e4 0x100b9809c 0x100a4cd78 0x181b21220 0x181b21110 0x181b1fb10)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)

Reproduced with: 2017.4.8f1, 2018.1.9f1, 2018.2.2f1, 2018.3.0a6.

Devices under testing:
-iPad Mini 4 (SoC: A8, iOS: 11.4),
-iPhone SE (SoC: A9, iOS: 10.0.1),
-iPad 5th gen (SoC: A9, iOS: 10.3),
-iPad Pro (SoC: A10X, iOS: 11.3),
-iPhone X (SoC: A11, iOS: 11.4).

Note: Shader was rendered incorrectly because point size was not set.

'APINotSupported' is fixed in 2018.3.0a10.