I’m just going to use my MPC to stem out the tracks from the S2400 I guess. Which sucks because it’s just an extra step. 
I feel like I’m doing something wrong but I’ve tried everything I can possibly think of. If anybody has any advice then please help. I have the Clock source on the S2400 set to USB B. Settings for Logic are in the pictures below. Have tried switching things around but still cannot get anywhere.
Reset the midi drivers, it’s in another tab in that options folder for logic.
These are my midi settings for controlling my S2400 (& my MPC’s) from Logic. Set your clock source to USB on the S2400 & it should all work - providing your mac & S2400 are connected via USB 
Hi, I just read your post. Your best bet is to get a hardware midi interface that’s USB. I personally use a Motu MTP AV model. You have to make sure the drivers for that model are compatible with your computers O.S. system. The interface is rock solid for sending out MIDI clock and MIDI timecode. The MTP AV gives you 8 simultaneous MIDI outputs and 8 Simultaneous inputs. I just use the outputs to send MIDI Beat Clock to all my hardware. Also, if you can MIDI Sync your MPC then just connect the MIDI Output from that to MIDI input on the S2400 and set the S2400 to receive MIDI Beat Clock Input, (External Sync Mode). The S2400’s Tempo must be set to External MIDI Sync mode instead of USB.
Second Solution: I’m not sure which Audio Interface you’re using but if it has a MIDI Output Jack on the rear then you can also use a MIDI cable to connect your S2400 MIDI Input to that and on the S2400 again choose External MIDI Sync mode Intead of USB. Both of these solutions should work. You also have to set Logic to Send MIDI Beat Clock Output if you have a MIDI output on your Audio Interface you can connect your MPC Input to that Audio Interface MIDI Out and set the MPC to MIDI Slave Mode then connect the MiDI Out cable of the MPC to your MIDI Input of S2400 and set S2400 to External MIDI Sync mode. Just make sure you are sending (MIDI Beat Clock ) Output from Logic. Problem solved, hopefully. Sincerely, Michael
That has been a headache for me for quite a while, and like the other person said, hitting the midi-reset will start the clock. With that said I’m using an iMac Pro 2019, and I was using Catalina OS, then a month ago I went to Ventura, and neither was doing the job, and I was having a lot of midi problems with Ventura and started reading a lot of forms about all the weird issues with Ventura and now I just updated to Sonoma about four days ago and everything works a lot better, so Ventura sucks. And I still have to reset the midi. But about three weeks ago, I plugged the S 2400 usb using a USB-C adapter into my M2 MacBook Pro in logic, and without any other hardware connected, only the USB to USB-C into the M2 MacBook, the midi clock worked perfect with the S 2400. Flawless, no resetting, just a perfect syncing. But my iMac Pro is unbelievably maxed out with 5AD converters and a ton of USB to machines and that could be causing a lot of issues. So my advice is to disconnect everything and if you’re using a Mac upgrade to the Sonoma because it works really well, except The focusrire 80 converters have to be restarted with every startup of the computer and then everything is fine. They just have not updated the drivers yet for Sonoma. I hope all this crazy message helps you.
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Sorry for the delayed response. Just had a newborn and had to go back to work from my baby leave this week. 
Thank you, everyone!! Resetting the midi drivers worked like a charm. Now I just need to figure out the delay so it syncs perfectly. Pretty close to on time as is though so shouldn’t be too hard.
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Congrats on the kiddo! 