I Bought some waves plugins, and when I open it on my Logic Pro x, I have just a black window.
What Mac do you have? And what OSX are you on?
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Hey friend. My Mac is an iMac mid 2011, and my OsX is the High Sierra.
Are you running V12 plug-ins? It could be that your graphics card can’t handle it. Check with support.
This is from a different thread with a similar issue…
This may be because your Mac’s graphics card does not support ‘Metal’, which is required for V12 plugins.
If any further assistance is needed, I suggest contacting our Tech Support - (https://www.waves.com/contact-support) team to assist according to your setup
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Oh man. I think u got it. I dont have metal. Ill check with support, thanks!
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Hi @haralemes Thanks for joining our forum 
In most cases following the steps to roll back to v11at this link will solve the issue.
I totally appreciate you. Its can graphic card problem.
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Wow, Graphic card can be problem for black window when opened in Logic pro x.
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