Possible DJM-S7 Driver / DVS Routing Bug on MacBook Pro M4 (macOS Tahoe)

Hello AlphaTheta Team,

I would like to report what appears to be a reproducible issue affecting DVS functionality on a DJM-S7 connected to a MacBook Pro M4 running macOS Tahoe.

System Information

• Hardware: DJM-S7
• Computer: MacBook Pro M4
• OS: macOS Tahoe
• Software: Serato DJ Pro
• Driver: Latest DJM-S7 driver available for Tahoe
• Firmware: Latest DJM-S7 firmware
• Source: Two turntables with Serato timecode vinyl

Issue Description

The mixer is correctly detected by macOS and Serato DJ Pro.

Audio playback works normally.
Serato operates normally.
The right DVS deck receives timecode signal and functions correctly.

However, the left DVS deck receives no timecode signal.

Diagnostic Steps Performed

To eliminate possible hardware causes, the following tests were performed:

✓ Swapped turntables
✓ Swapped RCA cables
✓ Tested cartridges and styluses
✓ Tested timecode vinyls
✓ Reinstalled latest DJM-S7 drivers
✓ Verified latest firmware installation
✓ Tested multiple Serato configurations

Most importantly:

The exact same DJM-S7, turntables, cartridges, RCA cables and timecode vinyls were connected to an older Windows HP laptop.

Result:
Both DVS decks function perfectly on Windows.

This strongly suggests that:

• Turntables are functioning correctly
• Cartridges/styluses are functioning correctly
• RCA cables are functioning correctly
• DJM-S7 hardware is functioning correctly

The issue appears only when the mixer is connected to the MacBook Pro M4 running macOS Tahoe.

Reason for Suspecting Driver/Routing Issue

Because:

• The right DVS deck works correctly.
• The left DVS deck receives no timecode signal.
• All hardware components have been verified using a Windows system.
• The problem is fully reproducible only on macOS Tahoe.

It appears possible that one DVS input channel (CH1 / USB Input 1-2) is not being correctly routed, exposed, or processed by the current DJM-S7 macOS Tahoe driver.

Additional Context

I purchased this MacBook Pro M4 with macOS Tahoe pre-installed and waited several months for official DJM-S7 Tahoe driver support to become available.

After installing the newly released compatible driver, this issue remains present.

Request

Could you please confirm:

• Whether similar reports have already been received.
• Whether this is a known issue with DJM-S7 on macOS Tahoe.
• Whether beta drivers, firmware updates, logs or additional diagnostics are available.

I would be happy to provide screenshots, videos and any additional information required.

Thank you for your support.

Best regards,

Tomas