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Mac Mini 2018 Purple boot?
- Thread starter Macs4u
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Think it’s something to do with Catalina and it not being compatible with my cable or monitor as Mojave was perfect. Going get a usb c to DisplayPort cable and see if that solves it.
I have the exact same issue as you.
On Catalina 10.15.1 my Mac mini 2018 with an HDMI connection to an Acer HD monitor boots with a purple screen. Has only been doing this since the upgrade from Mojave.
Once I get to the login screen everything's fine.
I have a Mac Mini 2014 running Catalina with the exact same HDMI connection to an Acer HD monitor which does NOT have the purple screen size 🥴
On Catalina 10.15.1 my Mac mini 2018 with an HDMI connection to an Acer HD monitor boots with a purple screen. Has only been doing this since the upgrade from Mojave.
Once I get to the login screen everything's fine.
I have a Mac Mini 2014 running Catalina with the exact same HDMI connection to an Acer HD monitor which does NOT have the purple screen size 🥴
If over HDMI, try to force RGB mode, Mac OS is using YCbCr by default when connected via HDMI, thinks your device is TV instead computer monitor.
Put the new cable in and tbh I don’t even see a boot screen. The monitor I have (Acer 31.5 1440p) has always gone through the different connnections such as hdmi/dvi/DisplayPort, to probably check for video on them and when it isn’t sensed it, moved onto the next. Its always done the other 2 that it isn’t connected to first. Now it does hdmi, dvi and then by the time it gets to DisplayPort it’s on the login screen.
I can also say I have purple screen as in picture of OP.
This started only after updating to Catalina, running on Mac mini 2018 on Philips Screen.
Edit: I see that this happens to me only when booting up from a shutdown, when restarting the Mac the boot window and apple logo are normal colors. Can anyone tell me why that might be ?
This started only after updating to Catalina, running on Mac mini 2018 on Philips Screen.
Edit: I see that this happens to me only when booting up from a shutdown, when restarting the Mac the boot window and apple logo are normal colors. Can anyone tell me why that might be ?
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I had similar issue when I connected my Mac mini 2014 (that was previously forced witd the EDID script to output RGB image through HDMI) to a new monitor and forgot, to reset the settings ...
gist.github.com
A script to fix EDID problems on external monitors in macOS
A script to fix EDID problems on external monitors in macOS - patch-edid.md
gist.github.com
I suspect it's a bug within macOS Catalina as I've had the same since upgrading on my former Acer 1080p monitor and my newer 4K UHD monitor.
Has nothing to do with Catalina, it's been present in Mac OS for years, my 2014 mini has had it since day one, there are reports of MacBook Pro's having it for years as well. It's more likely to be a hardware issue than a software one.
Apple are aware, and like many other issues they just don't give a fluff.
Apple are aware, and like many other issues they just don't give a fluff.
This sounds like a "synch'ing issue" between the display and the Mini at bootup.
My guess is that the cable is "the culprit".
Suggest anyone experiencing this try different cables.
And if you're using HDMI-->HDMI, try a different output/input scheme.
Sometimes, the only way to the solution is "trial and error".
My guess is that the cable is "the culprit".
Suggest anyone experiencing this try different cables.
And if you're using HDMI-->HDMI, try a different output/input scheme.
Sometimes, the only way to the solution is "trial and error".
I received a Mac mini 2018 the other day. I hooked it up to one of the monitors that is currently connected to a Mac Pro 2013 (also with Catalina). I get the initial purple screen with The Mac mini but not the Mac Pro. It only stays for a few secs then changes to black.
The mini went back as I want a different spec but it would suggest it's either software or Mac mini hardware as it never happens with the Mac Pro.
The mini went back as I want a different spec but it would suggest it's either software or Mac mini hardware as it never happens with the Mac Pro.
Would it be more accurate to say it's certain versions of Boot ROM causing this, rather than the OS?
In recent times, I've seen purple lines (on that boot phase only). This Mini '18 has so far never ran Catalina.
In recent times, I've seen purple lines (on that boot phase only). This Mini '18 has so far never ran Catalina.
Code:
Boot ROM Version: 1037.40.124.0.0 (iBridge: 17.16.11081.0.0,0)
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Our new Mac mini (purchased june 2020) worked fine out of the box using Catalina 10.15.4.
We are connecting via HDMI cable.
In the first hour of use, it wanted to upgrade to 10.15.5 , so we did.
After that upgrade, the splash screen went purple at the first boot, and a purple hue stayed.
The solution in post #7 of this thread fixed it.
Thank you so much to the people who share this kind of knowledge!!
We are connecting via HDMI cable.
In the first hour of use, it wanted to upgrade to 10.15.5 , so we did.
After that upgrade, the splash screen went purple at the first boot, and a purple hue stayed.
The solution in post #7 of this thread fixed it.
Thank you so much to the people who share this kind of knowledge!!