Would you be interested in testing something out on the internal branch with your device @csff131? Give me a PM and I’ll give you further instructions if so.
Maybe I’ll just update my resolution.
I’m having the same issue on my iMac
I think I would like to test something on the internal branch, but how do I pm.
We have noticed a bug in the latest Mac OS X version (High Sierra 10.13.6) which cause the rendering of persons in game to fail. Persons are still being simulated in the world but simply not rendered properly. We have done some investigation and found that other games have various graphical issues with this particular version. If you are running a Mac at 10.13.6 and are not affect by this bug, we would very much like to know if you took any steps to get around the issue. From what we know previous Mac OS X versions works fine.
Any other troubleshooting help or tips would be helpful. 
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ok thanks please fix this problem
Do you have the number to Tim Cook? 
No, joke aside we will try to get a Mac with this version to test it asap but we are pretty sure the issue is with Apples new update. Maybe it is graphic card related, are your graphics drivers up to the latest?
We as a general rule do not get much control over graphics card drivers. There are exemptions to that though.
This is not the latest version. I just tested on Mac OS Mojave version 10.14.3 and I have no render issues. I would suggest you to update your Mac to the latest version.
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For future reference / inspiration;
https://twitter.com/signalapp/status/1097920269484646401
How Signal tries to contact real people at google.
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Any chance that will get fixed? A lot of macs cannot be updated from High Sierra due to system constraints/age of hardware. Thank you!!!
Good point! Mac OS Mojave requires:
MacBook introduced in early 2015 or later
MacBook Air introduced in mid 2012 or later
MacBook Pro introduced in mid 2012 or later
Mac mini introduced in late 2012 or later
iMac introduced in late 2012 or later
iMac Pro (all models)
Mac Pro introduced in late 2013, plus mid-2010 or mid-2012 models with a recommended Metal-capable graphics card.
While Mac OS High Sierra still provides support for:
MacBook introduced in late 2009 or later
MacBook Air introduced in late 2010 or later
MacBook Pro introduced in mid 2010 or later
Mac mini introduced in mid 2010 or later
iMac introduced in late 2009 or later
Mac Pro introduced in mid 2010 or later
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I wish I could update to Mojave but I have the late 2011 MacBook pro edition. 
Also, updating the graphics won’t solve the issue, I tried it.
Is the 10.13.5 update still available on Apple’s website? One of the reasons I never update to the latest and greatest from Cupertino is because of compatibility issues. I’m in a production environment and need a stable platform. I always test latest releases within a VM first to see what breaks. That’s one of the reasons my 13" MBP is still running El Capitan as one of my main pieces of software I use at the current version I own, breaks on later versions of the OS. I will purchase the upgrade at some point for the newer version, but right now I don’t want too. Yes I understand the security implications and my network is a little more involved than most consumers networks.
Heck, until a few years ago I had a OS9.5 machine running production software. It was air gapped though.
I don’t know, check the website.
I need the Mojave edition, not High Sierra.
Hey, but any chance you guys will fix this for High Sierra since most macs cannot be updated to Mojave?