core: enable x11, employ MACH_BACKEND env var, minor fixes/tweaks
#3639
| Job | Run time |
|---|---|
| 6m 17s | |
| 4m 18s | |
| 2m 16s | |
| 12m 51s |
MACH_BACKEND env var, minor fixes/tweaks
#3639
| Job | Run time |
|---|---|
| 6m 17s | |
| 4m 18s | |
| 2m 16s | |
| 12m 51s |