The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/5805ae330521601a7a2693cab091514e19b4acf5

commit 5805ae330521601a7a2693cab091514e19b4acf5
Author: Dirk Pranke <dpranke@chromium.org>
Date: Fri Jan 12 02:43:08 2018

Turn on swarming for the Chromium Mac 10.13 FYI bot.

Swarming was previously disabled, since we didn't have
any swarming bots, but we do now. In particular,
this meant that the layout tests wouldn't have worked correctly,
since they can't be run locally as IsolatedScripts.

TBR=jbudorick@chromium.org, shrike@chromium.org, robertma@chromium.org
NOTRY=true
BUG= 748242 

Change-Id: If79268138b875f182fdd1bea6b1f34f0c56941ec
Reviewed-on: https://chromium-review.googlesource.com/862975
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Dirk Pranke <dpranke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#528859}
[modify] https://crrev.com/5805ae330521601a7a2693cab091514e19b4acf5/testing/buildbot/chromium.fyi.json
[modify] https://crrev.com/5805ae330521601a7a2693cab091514e19b4acf5/testing/buildbot/waterfalls.pyl

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/tools/build/+/fa98a9d5bc17b54e6f44a2d48a4fa6c785864314

commit fa98a9d5bc17b54e6f44a2d48a4fa6c785864314
Author: John Budorick <jbudorick@chromium.org>
Date: Mon Jan 22 23:38:26 2018

[chromium_tests] Add os:Mac-10.13 to the 10.13 bot on chromium.fyi.

Bug:  748242 
Change-Id: Ief9d474bee8d10e05fe6492fe097c154a3446b9e
Reviewed-on: https://chromium-review.googlesource.com/878928
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: John Budorick <jbudorick@chromium.org>

[modify] https://crrev.com/fa98a9d5bc17b54e6f44a2d48a4fa6c785864314/scripts/slave/recipe_modules/chromium_tests/chromium_fyi.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/tools/build/+/beb036b807d437305d57ed7b0469b3b47122dec4

commit beb036b807d437305d57ed7b0469b3b47122dec4
Author: John Budorick <jbudorick@chromium.org>
Date: Tue Jan 23 03:10:36 2018

Add gpu dimension to Mac 10.13 bot.

... because all of our 10.13 bots have one: http://shortn/_NkCicq2j1Q

Bug:  748242 
Change-Id: I46c7b7301ee02ddccac5670af5ad93156d94d5ec
TBR=dpranke@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/880002
Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: John Budorick <jbudorick@chromium.org>

[modify] https://crrev.com/beb036b807d437305d57ed7b0469b3b47122dec4/scripts/slave/recipe_modules/chromium_tests/chromium_fyi.py

Hi, what is the status on this issue? Seems to have been idle since January.

At Vivaldi we have seen serious issues with running browser_tests on Mac OSX 10.13.

We eventually "solved" the issue by disabling the screen saver on the 10.13 testers.

Recently I tried re-enabling (for v70) the screen savers on those testers, with the result that 1800+ of ~9000 tests failed, but the number of tests that fails are probably much larger, since the tester quit after ~900 of ~2900 tests failed.

The screensaver can't be on when running the tests.  Issue 828031  may be of note to you.

But this bug is fixed.