hi, could you have a look on this picture?
https://photos.app.goo.gl/KcdL8asu4qV4Widv5
my iMac works fine, but since this 10.14.5 I have those purple lines during startup.
i have done a fresh install with the latest Mojave .img and it happens the same, it will be related to the DSDT?
Thanks!
Send me iMacrmdg88.zip