macOS: Cubase cannot start due to HALion Sonic SE error

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Document type
Help Center Article
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macOS: Cubase cannot start due to HALion Sonic SE error

Problem

The following error message appears when Cubase is launched:

Cubase_HSSE_Error.png

Background

An outdated version of HALion Sonic SE is still installed. This prevents Cubase from starting because it is no longer compatible with newer Cubase versions.

Solution

  • Go to this directory:
    /Library/Application Support/Steinberg/Components
  • Delete the file "HALion Sonic SE.vst3"

Deleting the file "HALion Sonic SE.vst3" will not affect HALion Sonic 7 if it has already been installed.