Since updating my Mac OS X to High Sierra (version 10.13), I have been unable to Set Scale (Analyse > Set Scale), in order to perform measurements on my images.
More specifically, I am able to change any of the fields within the “Set Scale” dialog (Distance in pixels, Known distance, Pixel aspect ratio, etc.). I have tried “Click to Remove Scale”, in case there was one already assigned, but this does not work either. Scale remains as “< no scale >”.
I have also tried measuring on my image first (to determine the number of pixels I wish to set as my scale), but this does not get applied automatically in the “Set Scale” window as it previously did.
I am using the latest version of imageJ (1.50i), + Java 1.6.0_65, 64-bit. The Java installed on my machine is the latest Version 8, Update 144, build 1.8.0_144-b01.
Is anyone able to find out why I am unable to set scale and make measurements? Your help would be much appreciated!