After Tahoe update dooms day

MacBook Pro M1 Max – External HDD/SSD Disconnecting on macOS Tahoe 26.7

Since you are ‘using a 14-inch MacBook Pro M1 Max running macOS Tahoe 26.7, let us narrow down what is causing the problem without putting your music files at risk.

An external drive disconnecting does not necessarily mean macOS is deleting files. It could be a connection issue, power interruption, drive enclosure problem, filesystem error, or software compatibility issue.

Step 1 Before troubleshooting, make sure your important beats, projects, and Kontakt libraries are backed up. Since you have previously experienced missing files, avoid formatting the drive or attempting repairs until your data is secure.

Step 2: Connect the external drive directly to your Mac without using a USB hub or docking station. Try another USB-C port and, if possible, a different cable. Keep your Mac connected to its charger while testing.

Step 3: Open Applications > Utilities > Disk Utility and select View > Show All Devices.

Check what happens:

• If the drive appears but is not in Finder, its volume may not be mounting correctly.

• If it appears greyed out, it may be unmounted.

• If it disappears completely, investigate the cable, port, enclosure, power supply, or drive itself.

Do not erase or reformat anything.

Apple's instructions for checking and repairing external storage are here:

How to repair a Mac storage device with Disk Utility

Step 4: Once your data is backed up, copy a small file to the external drive. Then try installing one small VST.

If regular file transfers work but VST installations cause disconnections, we should investigate Native Instruments and installer compatibility.

If the drive disconnects during both activities, the connection, enclosure, power delivery, or drive hardware may be responsible.

Step 5: Make sure Native Access, Kontakt, and your instrument installers are updated.

Native Instruments currently lists Native Access 3.21.1 and Kontakt 8.8.0 as minimum supported versions for Tahoe, with newer compatible releases also possible.

Check the official compatibility information here:

https://support.native-instruments.com/support/solutions/articles/69000879237-native-access-macos-26-tahoe-compatibility-statement

Native Instruments has also acknowledged problems involving older installers and external drives on newer macOS versions. Most affected installers have since been updated.

Their explanation and resolution are here:

https://community.native-instruments.com/discussion/47355/known-issue-failing-installation-for-certain-products-on-external-hard-drive-on-macos-15

If Native Access displays an installation failure, also check its Full Disk Access permissions. Native Instruments explains how to do that here:

https://support.native-instruments.com/support/solutions/articles/69000879263

Step 6: Find out whether your drive is formatted as APFS, Mac OS Extended, or exFAT. Do not reformat it just to change the format.

If your data is backed up and the drive is stable, consider running First Aid in Disk Utility. If the drive repeatedly disconnects, secure your data before attempting repairs.

You can also use the manufacturer's diagnostic software to check drive health and temperature.

Step 7: If possible, connect the same drive to another computer.

If it disconnects there too, the drive, cable, or enclosure may be the issue. If it works perfectly elsewhere, we'll need to investigate your Mac's USB-C/Thunderbolt connections and macOS Tahoe.

If Kontakt libraries appear missing after reconnecting, Native Instruments also provides guidance for external drives that require repeated relocation:

https://support.native-instruments.com/support/solutions/articles/69000879251

We need to establish whether this is a Tahoe-related compatibility issue, USB/Thunderbolt instability, an external drive problem, or something happening during Native Instruments installations.

One important point: The distinction between the drive disappearing from Finder and disappearing completely from Disk Utility is particularly useful.

That will help determine whether we are dealing with a mounting problem or an actual loss of communication with the external drive.

You are not talking to Apple, we are users like yourself, trying to help one another.

You can get effective help by slowing down and stating calmly and clearly your issues.

This is a good read in this regard:

Writing an effective Apple Support Communities question

Also: lots of issues tend to be caused by stuff that is installed in one user's mac, and we have no way of knowing about it unless you tell us.

Please run Etrecheck and post its full report here. Use the "additional text" button and paste the report into the text box.

Etrecheck is a free utility by a long time respected member of this community, created for this very reason - to allow users to have workable information on what an affected mac is running so we can help diagnose problems.

I am calm just used exaggerated words but my hard drive disconnects in mid installation of a vst I’ve never scene my data go missing on Tahoe 26.7 no MacBook Pro max 14 m1