Fix MenuBarExtra popup collapsing on macOS 26.4 by restoring fixedSize

[travisp]

On updating to macOS 26.4 this past week, I found that AudioPriorityBar can open with an apparently blank device list even though CoreAudio is still returning devices correctly.

Screenshot showing no devices, or even any hidden devices:

This happens even though the devices seem to be in the window:

 osascript <<'APPLESCRIPT'
 tell application "System Events"
   tell process "AudioPriorityBar"
     if (count of windows) = 0 then
       tell menu bar item 1 of menu bar 2
         perform action "AXPress"
       end tell
       delay 1
     end if
     set s to size of window 1
     set txts to {}
     repeat with t in static texts of scroll area 1 of group 1 of window 1
       set end of txts to (value of t as text)
     end repeat
     log "size=" & (item 1 of s as text) & "x" & (item 2 of s as text)
     log "texts=" & (count of txts)
     log txts as text
   end tell
 end tell
 APPLESCRIPT (timeout 120s)

 size=340x133
 texts=13
 SPEAKERSActiveLG ULTRAFINE2MacBook Pro
 SpeakersMutedMICROPHONESActiveAirPods Pro2iPhone Microphone3MacBook Pro
 Microphone

I didn't experience this until updating to 26.4

I believe the cause is that the current MenuBarExtra(.window) layout relies on:

ScrollView { ... }
    .frame(maxHeight: 420)

but the root popup view no longer has:

.fixedSize(horizontal: false, vertical: true)

I can't find anything saying anything changed in 26.4, but this change fixes the problem for me. If it's not just me, hopefully this is helpful.

[charpeni]

Thanks for sending this! I don't have write permission either way, but I wanted to share that I experienced the same issue.

I initially thought it was a permission issue with Tahoe, but it turns out your one-line fix is the solution. I can see all my devices correctly now.