I searched the internet for 2 hours and finally found this 4K UHD copy software. It does a brilliant job ripping the 4K Blu-rays to my hard drive without losing the fantastic video quality.
— Quote from a user on Macupdate
As movie studios weigh more on 4K Ultra HD Blu-ray releases these days, the consumer demand on 4K UHD backup software also witnesses rapid growth. DVDFab UHD Copy for Mac is the 1st 4K UHD Blu-ray copy software exclusively designed for macOS platform. It helps users copy the main movie title or the entire contents of a 4K Ultra HD Blu-ray to computer hard drives saved as ISO files or folders, in a 1:1 lossless manner and without losing the Dolby Vision and HDR10 video quality. As of now, we already support most of the 4K UHD titles. Also, you may need a compatible UHD drive, see our Supported Drive List.
Unless you intentionally want to downscale the video quality for some specific reasons, when making backup copies of 4K Ultra HD Blu-ray discs, keeping the original 2160p video quality should be your No. 1 priority. In this respect, DVDFab UHD Copy for Mac can be a perfect match. It can produce 1:1 lossless (2160p) ISO file or folder out of a 4K Ultra HD Blu-ray in the Full Disc, Main Movie and Clone modes.
Speak of video quality, besides the 2160p resolution, the HDR10 or Dolby Vision technology is also employed to improve the video quality of a 4K UHD Blu-ray. On a HDR10/Dolby Vision compatible TV, the brightness of highlights can be significantly boosted and the natural color dramatically increased. With this Mac 4K Blu-ray copy software, you lose none, both HDR10 and Dolby Vision contents can be preserved.
DVDFab UHD Copy for Mac is the 1st Mac 4K Ultra HD Blu-ray copy software to copy the 4K Ultra HD Blu-ray movies to ISO files or folders saved on hard drives, in 2160p quality.
Download and install the latest Mac version of DVDFab 12 onto your Mac computer;
Launch DVDFab 12 for Mac, navigate to the Main Movie/Full Disc/Clone mode under the Copy module;
Load the 4K Ultra HD source (a disc, ISO file or folder), then at the Save to section, choose the output destination, and finally, click the Start button to let go of the copy process.
4K Ultra HD disc, ISO file and folder
ISO file and folder