List of compatibility issues with Adobe Creative Cloud products running on macOS 10.13 (High Sierra) Did you install the Legacy Java Runtime, Download Java for OS X 2017-001.
I have just installed an old copy of Lightroom 4 on my macOS High Sierra partition and it works fine. The app offers powerful photo editing features in an easy-to-use interface. Create incredible photos anywhere with Lightroom and 1TB of cloud storage. The cloud-based service for people who love photography, Lightroom gives you everything you need to edit, organize, store, and share your photos across desktop, mobile, and web. Adobe recommends that customers update Lightroom to the current version prior to updating to macOS v10.13 (High Sierra).
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