For the most part, the applications I use are 64-bit, with one exception. I've been using an application called "Synchronize! Pro X" for the past 20 years, but its's 32-bit and the developer told me he doesn't plan to update it to 64-bit. He wrote, "With Apple making it a lot of work to rewrite Synchronize! Pro X, I've decided to take the opportunity to retire instead." I rely on the application everyday to synchronize 2 folders. It copies files both ways and gives me a useful preview list of files it plans to copy with colorful arrows indicating the direction of the copy. It also allows me to manually change the direction of a copied file on a per file basis in the preview. Are there any other apps out there that have similar features? Thanks.