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I'm trying to install LabelImg, but in order to do so I need to install qt4 first because I'm using python 2. All the guides I find tell me to do 

brew install qt qt4

But I just get "Error: No formulae found in taps." I also tried 

brew install cartr/qt4/qt

But when I went to build LabelImg I get

make: *** [qt4py2] Error 1

I am on the latest version of OSX and I have tried the alternative methods of installing Qt, it seems like it is installed properly, but I can't use it to make anything

Andy
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2 Answers2

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This Homebrew tap allows you to install Qt4 (and various packages that depend on it) on macOS Sierra and newer. You can install it like this:

brew tap cartr/qt4
brew tap-pin cartr/qt4
brew install qt@4

Source

itsdarrylnorris
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  • I ran make qt4py2 and it still gave me the same thing after doing all of the above steps – Andy May 22 '18 at 00:57
  • +1. FWIW, on High Sierra, for the second command I got `Error: Unknown command: tap-pin`, but the first and third commands appeared to be successful. – Greenonline Jul 24 '21 at 16:20
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Try this:

brew install cartr/qt4/pyqt@4

Ram Ghadiyaram
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Nina Cai
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  • On OSX, you might also need to run `brew install openssl@1.0` see https://github.com/cartr/homebrew-qt4/issues/67 – Max Reeder May 12 '20 at 04:11