"Operate by Instruction" does not show disassembly on macOS

Steps to reproduce:

• Follow https://wiki.qt.io/Qt_Creator_ManualTests_DebuggerLldb#Test_1
• Add Breakpoint in "testFormats"
• Start debugging
• once breakpoint is hit, turn on operator by instruction

expected:

• Disassembly is shown

actual:

• Only the debugger cursor disappears