Why i don't have qmake.exe?
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Once again, you are looking at Qt Creator, not Qt.
You are in the "Tools" folder wile Qt itself is in a folder with the version number as shown in your picture under "auto-detected" -
@VRonin But there is no such folder, with version as name.
UPD. My mistake, it was needed to download at least one thing from 5.12.0 folder at stage of installing Qt
