RFR: 8235627: Fixed blank stage when running in macOS guest VM

[Frederic Thevenet]

https://bugs.openjdk.java.net/browse/JDK-8235627

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Commits:
 - 73523680: 8235627: Fixed blank stage when running in macOS guest VM

Changes: https://git.openjdk.java.net/jfx/pull/65/files
 Webrev: https://webrevs.openjdk.java.net/jfx/65/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8235627
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jfx/pull/65.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/65/head:pull/65

PR: https://git.openjdk.java.net/jfx/pull/65