It appears not to exist in the 2013+ versions but in an edit to a video of his, dosdude1 appears to suggest that it is possible for mid-2012 rMBP.
When I tried in Mojave nothing seemed different to a normal boot.
Can anyone give clarification as to whether such a mode exists for this model? And if so whether there are special conditions for invoking it (e.g. specific OS versions) and/or indications of success (I know old Mac Pros will flash their LEDs and give a distinct tone).
When I tried in Mojave nothing seemed different to a normal boot.
Can anyone give clarification as to whether such a mode exists for this model? And if so whether there are special conditions for invoking it (e.g. specific OS versions) and/or indications of success (I know old Mac Pros will flash their LEDs and give a distinct tone).