Hey @mskerwiderski,

How did you install ImageMagick? Are you sure your ImageMagick has been installed with LibTIFF enabled? As far as I know the available binaries already include that, but if you have installed IM using Homebrew, you may want to uninstall and reinstall it with LibTIFF enabled explicitly. 

Run the following command to make sure LibTIFF support is properly installed:

    convert -list configure | grep LIBS

or 

    brew info imagemagick | grep DELEGATES
    
But in any case you may still benefit from a fresh installation with explicit mention of LibTIFF support:

    brew uninstall imagemagick
    brew install libtiff
    brew install --with-libtiff imagemagick

or

    brew install --with-libtiff --ignore-dependencies imagemagick

Running the `info` command above will also inform you about the other options available when installing IM (including X support). 

If none of these works, just try [the binary version from Cactus Labs](http://cactuslab.com/imagemagick/) (or if you have the binary version, trey the Homebrew version). I have also had this issue before and each time it has been solved in a more or less random way through reinstalling. In one case the problem was that ImageMagick had been installed without parallel support, and thus was running on a single CPU core, and it was extremely slow.

An important tip: When checking your installation, use a low-resolution scan with a small size. Sometimes IM is not hanging but for some reason it lacks resources or fails to recognize and utilize the available resources.

Just keep in mind that my updates to the code are not finalized and the additions contain known bugs. Use [the original script](https://sites.google.com/site/negfix/howto) for testing purposes and then switch to any of the upgrades you like if you are interested in additional features.