Issue Overview 
When you transfer downloaded files from a Mac to a USB flash drive or SD card, hidden system files with names beginning with ._ (dot underscore), metadata files generated by macOS, may be created. These files are invisible on macOS but can interfere with playback on other devices.


Solution

To ensure smooth playback, these ._ files should be removed from your storage device. On a Windows device, show hidden


Instructions:

  • Method 1: Remove Files Using a Windows PC
    1. Connect your USB to a Windows computer.
    2. Open File Explorer from the taskbar.
    3. Select View > Show > Hidden items.
    4. Open the drive and locate all files beginning with ._.
    5. Select and delete these files.
    6. Empty the Recycle Bin before ejecting the device to ensure the files are permanently removed.

  • Method 2: Remove Files Using Your Display Device 
    Some projectors, TVs, or media players allow file management directly from the device:
    1. Insert the USB into your display device.
    2. Navigate to the file management or media browser section.
    3. If supported, select and delete the ._ files.
    4. Refer to your device’s user manual for specific instructions, as not all devices support file deletion.

  • Method 3: Use a Cleanup Utility on macOS
    If you prefer to manage files directly on your Mac, third-party utilities are available to remove these hidden files:
    • Research and choose a reputable cleanup tool that supports the removal of macOS metadata files.
    • ViewSonic does not endorse a specific application, but here are a few commonly used options:
      • CleanMyDrive 2
      • Dot_clean (Terminal command)
      • BlueHarvest
      • OnyX

These tools can safely remove ._ files without affecting the functionality of your original media files on macOS. By following one of these methods, you can ensure your playlists play seamlessly on any compatible device.


 

For additional questions, please contact ViewSonic's Support by submitting a support ticket HERE or by Phone: US: 800-688-6688, CAN: 866-463-4775. ViewSonic’s call center hours: M-F, 6 AM - 6 PM PST.