How do I disable my MacBook Pro’s internal screen?
 
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How do I disable my MacBook Pro’s internal screen?  

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Piipperi800
(@piipperi800)
Eminent Member
Joined: 3 months ago
 

Ok, so I have my eGPU working fine but the internal screen is still on, which is something I don’t want (as I really hate how my mouse can disappear there and some apps might open there by accident). How can I disable the internal screen or get around this issue? Edit: also a lot of apps seem to think I'm in retina display mode even thought I use my external 1080p display...

This topic was modified 2 months ago

MacBook Pro 15" Late 2013, Sonnet Breakaway Box 550, AMD RX 5700 XT


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Piipperi800
(@piipperi800)
Eminent Member
Joined: 3 months ago
 

@mac_editor do you have anything to say about this? I mean, when I tried "sudo nvram boot-args="iog=0x0"" command in Terminal (found this from some old site that it could turn off the screen from my MacBook), it just disabled the purge-nvda patches... and when I applied them again, everything was like normal again (including my internal display being on despite not showing a picture). I keep encountering more and more issues with my external display due to apps thinking I'm using my retina display.

MacBook Pro 15" Late 2013, Sonnet Breakaway Box 550, AMD RX 5700 XT


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mac_editor
(@mac_editor)
Famed Member Moderator
Joined: 4 years ago
 
Posted by: @piipperi800

mean, when I tried "sudo nvram boot-args="iog=0x0"" command in Terminal

You overwrote whatever purge-nvda did there. Just use something like SwitchResX to disable the internal monitor if required. iog=0x0 doesn't really work anyway after wake iirc.

Also deleted your other post as it was duplicate/repeat.

purge-wranglertbt-flashpurge-nvdaset-eGPU
Insights Into macOS Video Editing Performance

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2019 13" MacBook Pro [8th,4C,U] + RX Vega 64 @ 32Gbps-TB3 (Mantiz Venus) + macOS 10.14.6 & Win10 [build link]  


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Piipperi800
(@piipperi800)
Eminent Member
Joined: 3 months ago
 

@mac_editor, ok thanks, do you know any free tool that could do the same as SwitchResX? Not really looking to pay that much for an app to just turn off a screen.

EDIT: also, when I exit from a game like Sims 4, the second screen gets reactivated. Also my wallpaper looks like this when I disable my internal screen, is this normal?

Näyttökuva 2020 12 3 kello 19.18.34

I was also thinking you could add a setting to disable the internal screen right into the purge-nvda if you know how to do it properly.

This post was modified 2 months ago

MacBook Pro 15" Late 2013, Sonnet Breakaway Box 550, AMD RX 5700 XT


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Piipperi800
(@piipperi800)
Eminent Member
Joined: 3 months ago
 

@mac_editor, the problem with SwitchResX is that it doesn't really work with Big Sur. For example, if I turn off my main monitor, it turns my internal display back on. And same happens if I enter a game like Sims 4

May I ask, is there a reason why the purge-nvda can't run in docked mode?

 

MacBook Pro 15" Late 2013, Sonnet Breakaway Box 550, AMD RX 5700 XT


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