(Not surprising as both are limited by write speeds on the HDD.) When copying from a HDD onto either a second HDD or the fusion I typically got about a 10% speed improvement with RapidCopy.Ĭopying from the fusion drive (effectively a SSD at this point) onto a HDD, RapidCopy and drag and drop were usually a wash. I typically got about 50% speed improvements. That keeps the drive from having to rapidly jump back and forth between read and write operations. RapidCopy does the sensible thing and copies a bunch of stuff into memory, then writes the stuff out onto disk. The place where RapidCopy gives the greatest benefit is copying from a HDD ONTO ITSELF. Copies were done among a fusion drive (essentially a SSD for current purposes) and a couple of Seagate USB3.0 external drives. (After all, the app is called RapidCopy.) I ran a bunch of rough tests using large (~100 GB) copy jobs and many (~25,000) files of varying sizes.

Think of it like driving a stick instead of an automatic.įirst, copy speed.

This app is a mixed bag, depending on what matters to you and whether you understand what is going on well enough to make it work for you.

Mac fast copy