I looked through all of the posts in the "JRiver Center 25" forum, and also searched using this and other search parameters, and I don't believe this question has been covered.
Here's a thread that documents most of the differences between the Windows and Mac versions of MC:
https://yabb.jriver.com/interact/index.php?topic=97363.0I'll cover more of your questions below.
(1) I assume I can copy over the JRiver and Roon data base backups to the Mac using the Mac migration utility, but would greatly appreciate any advice and warnings in that regard.
Roon, I have no idea. MC database: You can definitely transfer over a database BACKUP and restore it into an MC Library on the Mac. However, your file structure will be a bit different because you won't have drive letters and on the Mac external drives appear as:
/Volumes/Name Of Hard Drive Here/stuff
You'll need to use a tool called the Rename, Move, and Copy files tool to tell MC, "Hey all of these files moved over here". It's not hard, but it's detailed. It's documented on the Wiki pretty thoroughly:
https://wiki.jriver.com/index.php/Rename,_Move,_and_Copy_FilesYou'll probably have questions and might want to start a separate thread topic about the procedure. The procedure has kind of a lot of steps, including copying all of your files from your NTFS drive to another drive, etc. It's not hard. But it will look "big" when it's all written out.
Will the data base work OK when shifted from an NTFS file system to the Mac OS file system?
Since you're transfering a backup file and restoring it, it will be no problem; other than the Rename, Move, and Copy Tool being necessary. THis is a good place to mention that Windows uses backslash between directory names, while Mac uses slash: \ versus / . RM&C was "fixed" to deal with this a while back, but I have not personally tested it, so I'm not sure how it deals with this issue. I hope it's all automatic and easy, but not sure. It's something to watch for when doing the RM&C step.
(2) Is audio quality essentially the same when comparing the Intel audio drivers in Windows versus the Mac OS audio drivers?
Presuming that your DAC has USB audio generic support, then yes. You would want to make sure that your DAC shows up on Mac as a device. If so, MC can use it and the quality will be very good. If you are using HDMI for audio and you want multichannel to work, it might get hairy. I haven't messed with this myself, but the reading I've done makes me unsure if it works well or not.
(3) Is there any difference with regards to how an audio or video signal is passed by HDMI when using JRiver for Windows versus Mac? Or when comparing how the Windows operating system works when passing or upsampling audio files, versus the Mac OS?
Video will be "totally different" on the Mac version of MC. The video engine is something that was written from scratch on the Mac. On Windows it's "Red October" which is kind of a third party windows specific tool. Red October has a bunch of customization that can be done for many parameters. Including some kind of manual video scaling settings (upsampling of video as you mentioned). The Mac version does none of this. You get video at the resolution of the monitor as presented to Mac OS. It seems mostly fine. I'm picky though and noticed that video seems a bit soft and "odd" from time to time. So I'm no longer using Video on MC for Mac. I'm using another product instead.
One article (link below) said that once the Mac Audio Midi Setup is set up for 2 channel 24/96, "you can play files at any resolution up to and including 24/96; lower-resolution files will actually be upsampled to 24/96 (which, unfortunately, won’t make them sound any better.)"
MC for Mac will play files at whatever resolution you tell it to and that your DAC supports. For example, if your DAC supports 96kHz and 44.1kHz, you can tell MC to pass those through as is. MC will handle working with the Mac audio driver to set these settings for you in real time, so you don't have to do anything extra after you configure it how you want it using the DSP Studio > Output Format . For formats that your DAC does not support (like 88.2 for example), you can tell MC what to do: Upsample to 96kHz. Or downsample to 44.1kHz. MC does it all transparently after you configure it.
(4) I have a few files recorded in 24/192. An article (link below) reported that as of several years ago, the Mac OS will not play files at 192. Is that still the case?
I didn't read the article, but NO that's totally false. I have played 24/192 files using MC on my Mac with a DAC that supports it.
(5) I've read articles that state that the Mac OS will not read or play back most encrypted or protected HD digital video? (See the link below.) Will JRiver for the Mac OS play back the blu-rays I ripped using MKV?
If you have ISOs of DVDs or BDs that are encrypted, then MC for Mac will NOT play them. MC for Windows relies up yet another third party tool to do this decryption "silently" behind the scenes. However, you mentioned MakeMKV. Generally speaking when you rip titles from BDs or DVDs with MakeMKV, it decrypts them and writes them as normal video files, playable by any player with the right CODECs. I have hundreds of MKVs that I've ripped from DVD and BD and they all play just fine with MC for Mac and with other Mac video players.
Will J River for Macs play back DTS HD Master and Dolby True HD?
Yes. MC will not play Dolby Atmos or DTS:X content. It *can* bitstream that content to a processor (or receiver) that can decode it. But yes DTS-HD MA and Dolby True HD are natively supported.
(6) I have used MakeMKV for ripping Blu-Rays for my own personal use. That is only available for Windows though. Will JRiver successfully rip commercial Blu-Rays?
Well, good news first: MakeMKV is fully supported for Mac. I have used the Mac version to rip hundreds of disks. Download yours today!
MC for Mac will rip CDs. But it won't do anything with any kind of video disc. No DVDs, No BDs, No ultra 4k. But MakeMVK works, so you're all set.
MANY THANKS for any responses and advice! Your assistance is greatly appreciated.
You are welcome. You might owe me a beer.
When you are ready, you can download a 30 day trial of MC for Mac and try all of this stuff before you buy. Good luck to you!
Brian.