iNMR is a fantastic app for NMR spectroscopy, it has been around for over 20 years and gets better with every release. It has been compiled for the Apple Silicon but runs on older Macs as well. Looks great on Mac OS 10.11 and even better on macOS 26 Tahoe.
No registration is required to try it out for a time limited (30 min) demo, registration simply removes the time limitation. The developer is very responsive.
Recently, users started complaining that iNMR wasn’t handling a certain type of spectra well. On March 19th, someone wrote just five words: “Be nice to have NUS.” Less than a month later, we have it. iNMR now automatically recognizes these experiments and applies the necessary algorithm. You can see a preview here: https://youtu.be/ETiluQ620V8.
Since these algorithms are incredibly demanding (thousands of times more than an FT), I’ve introduced parallel computing. By using all the cores of your CPU, calculation times are 4 to 8 times faster. A 2D spectrum now processes in about a second. I’ve also parallelized spin system and chemical exchange simulations. On my old 2021 iMac, you can now simulate a 13-spin system in less than ten seconds.
Many chemists just need to print a spectrum on their own or to insert it into a slide. iNMR reader is more than enough for these tasks. It’s a lite version that contains much of the functionality of iNMR.