Level 1 (59 points)

CMD-Z corrupts environment macro

Hi everyone,

This is very strange behavior. You can download the projects here,

https://robertcharlesmann.com/wp-content/uploads/2026/10/CMD-Z-corrupts-Environment.zip

[This is a Direct Download Link]

The first project has a routing in the environment that has worked for years. It's usually a macro but I've unpacked it here.

The second project file has a small MIDI recording, then I pressed CMD-Z after the recording and in the environment the Channel switcher cables itself to the Physical Input which prevents any external MIDI signals. Also, all the operations cable themselves to MIDI output.

To replicate this you may have to make the macro again and unpack it.

Anyone have a fix for this?

Mac mini M5 Pro 24GB - Logic Pro 12.4

2 JPGs attached for quick look

Posted on Oct 12, 2026 1:46 AM

6 replies

yoyoBen

Level 4 (3,827 points)

Oct 12, 2026 9:06 AM in response to thencamenow

I haven't downloaded your project. However, did you know you can protect the Environment?

View > Protect Cabling/Positions

yoyoBen

Level 4 (3,827 points)

Oct 12, 2026 12:22 PM in response to thencamenow

If you've found a reproducible bug, then send a bug report to apple:

Feedback - Logic Pro - Apple

thencamenow Author

Level 1 (59 points)

Oct 12, 2026 9:33 AM in response to thencamenow

I've checked the same template in v10 and it works.

When I open this template in v12 and the macro is still packed, if I record MIDI on an instrument track then hit CMD-z, it rewires the macro. After unpacking the macro the cables are all reconnected somewhere else.

thencamenow Author

Level 1 (59 points)

Oct 12, 2026 12:07 PM in response to yoyoBen

Thanks for the suggestion. I protected the environment but the procedure still scrambles the wiring inside macros.

Johne154

Level 2 (464 points)

Oct 12, 2026 12:24 PM in response to yoyoBen

Thanks, Ben! Good to know.

thencamenow Author

Level 1 (59 points)

Nov 6, 2026 9:15 AM in response to thencamenow

UPDATE - Logic v 13.0

CMD-Z after adding a note in a MIDI region still destroys Environment macros.

Originally posted at discussions.apple.com/thread/256374633