Saying I have a Macbook Pro is like saying I have a Ford Mustang or BMW (fill in the model)... that really is saying very little (to almost nothing meaningful, technically. In the car example there is a massive range of engine and suspension options.) for a computer, Which year/CPU (exact model), RAM, storage, etc ? ... these all matter.. a LOT. And that Apple changed away from x86 to its own in-house CPU, which OBS v27 is NOT compile for. OBS v28 should be much more performant on M1/M2 Macs
And there are those that can stream at 1080p on a 10yr old computer, depending on other workloads, and those that struggle with 4 year old computers, and some workloads that can bring a US$10K workstation to its knees ... it depends. I learned OBS to help out a House of Worship 2.5 yrs ago. I'm not involved in gaming in any manner
I streamed just fine on a 5yr old engineering workstation laptop, knowing plenty about Operating System optimization, and very little at the time of OBS. I tried to stream 2 years ago with an Intel i5-6300HQ (2.3GHz 4c/4t circa Fall 2015), 8GB RAM, SATA SSD Win 10 (fresh, optimized install), Nvidia GeForce GTX 960M GPU (meaning NVENC support) and failed as the PC wasn't up to the task /my settings (no gaming, no CPU intensive plugins like chroma or noise filtering, etc, just alternating between USB webcam and simple pre-recorded videos (some were 4K), alongside a PPTx slide show window capture, streaming at 720p 30fps with no OBS effects/filters). I’ve learned a lot more about OBS since then, and I might be able to just squeak it out
Understand that OBS is a very powerful, flexible free open-source tool. Meaning the onus is on the end-user to learn the nuances of the tool. There are much simpler tools for livestreaming, that also lack the capabilities of OBS to composite from multiple sources. So, it depends on what you want the end video to look and sound like (in technical detail) as that will drive the hardware and software requirements to pull that off. It that is too techie, and you have the money, get a powerful overkill system and don't optimize. And by powerful, I don't mean what an Apple store or similar person will indicate, when they are commenting in regards to common user web browsing or simple document editing. If a you want to buy a new system, and the person/people you talk to don't know the technical requirements for livestreaming with a powerful tool like OBS, then a simple (somewhat close comparison, would be to Adobe Premier for real-time video-editing)