Ramdisk by Dataram Inc. is an application that allows you to create a virtual RAMdisk where temporary files can be copied when there is no enough RAM in your Mac. This process speeds up the process of launching and using apps. Although there is no version of Ramdisk for Mac developed yet, you can always use other applications that have the same functionality. Here is a list with some alternatives to Ramdisk for Mac.
Feel free to add any alternative to Ramdisk for Mac that you know of.
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Confirmed TmpDisk works with Catalina 10.15