Mac mini M6 vs ASUS NUC 15 Pro+: Which Dedicated Streaming PC for OBS?

The direct answer

For a second machine that only runs OBS, takes a capture card in and sends the stream out, the ASUS NUC 15 Pro+ is the safer default if hardware AV1 encoding, HDR capture or cheap memory and storage upgrades matter to you. The Mac mini (M6 or M5 Pro) is the better pick if you want the smallest, quietest box, plan to deliver H.264, and value Thunderbolt and an optional 10Gb Ethernet port.

The biggest caveat is codec support. Apple's specification page lists AV1 decode only for the new Mac mini, with no AV1 encode. Intel lists AV1 encode for the Core Ultra 9 285H in the NUC. If your destination or archive needs AV1 encoding in hardware, the Mac mini is the wrong tool.

One correction first: the M4 Mac mini is no longer the current model. Apple announced a redesigned Mac mini with M6 and M5 Pro on 2026-08-25, and it began shipping on 2026-09-22. There is no base M5 model. The ROG NUC (2025), with an NVIDIA laptop GPU, is covered below as the discrete-GPU tier.

This comparison rests on manufacturer documentation and project release notes as of 2026-10-08. It does not rest on measured performance.

What the current documentation establishes

Apple's newsroom post of 2026-08-25 announced the Mac mini with M6 and M5 Pro, with pre-orders that day and availability from 2026-09-22. A second Apple post on 2026-09-22 confirmed the machines were available. Both posts give U.S. starting prices of $899 for the M6 model and $1,699 for the M5 Pro model, as published by Apple on those dates. Macworld's buying advice, updated 2026-10-05, describes the same lineup and treats the M4 as the previous generation.

Apple's technical specifications list a hardware media engine on both chips: hardware-accelerated H.264, HEVC, ProRes and ProRes RAW, with separate video decode, video encode and ProRes engines, plus AV1 decode. Apple does not write that AV1 encode is absent. The absence is an inference from the list, and a reasonable one, but it is an inference. The same page lists three Thunderbolt 4 ports on the M6 model and three Thunderbolt 5 ports on the M5 Pro model, two front USB-C ports at up to 10Gb/s, HDMI, and 2.5Gb Ethernet with a 10Gb option.

ASUS publishes technical specifications for the NUC 15 Pro+ in two forms: NUC15CRS, a kit with Windows 11, memory and storage included, and NUC15CRS-B, a barebone with no operating system. Processors run from Core Ultra 5 up to Core Ultra 9 285H. Intel's ARK page for the 285H lists Intel Arc 140T graphics with hardware encode and decode for H.264, H.265 (HEVC) and AV1, plus Quick Sync Video.

What could not be verified matters just as much. No ASUS price was readable on an official page: the ASUS eShop listing for the Core Ultra 9 configuration showed no price and was marked out of stock on 2026-10-08. The ROG NUC (2025) page loads on the ROG site, but its US store page did not, so neither its price nor its availability is confirmed. Nothing in the documentation compares the new Apple chips with the M4 for encoding, and no sustained-load noise or thermal figures exist for any of these machines under OBS.

On software, the OBS download page lists version 32.2.2, released in August, with macOS 13.0 or newer and Windows 10 or 11. The OBS system-requirements page still says macOS 11, but that page carries a 2021-08-25 date and the download page and release notes supersede it. For the current OBS, read the requirement as macOS 13 or newer.

Evaluation criteria

A dedicated stream box has a narrow job, so the criteria are narrower than for a general-purpose computer. Seven are used here, in the order a buyer should check them.

• Hardware encoders and codecs: the box must encode the codec your destination accepts without leaning on the CPU. A software fallback can work on a quiet scene and fail on a busy one.
• Capture-card path: the interface, the driver model and the operating system decide which cards work and which features, such as HDR, survive.
• Ports and network: the number of free high-speed ports limits how many capture devices you can attach, and wired Ethernet speed limits NDI feeds and the outgoing stream.
• Software ecosystem: current OBS support for the operating system, and whether plugins such as NDI support exist for the platform.
• Thermals and noise: a stream box often sits next to a microphone and runs for hours at steady load.
• Expandability and lifespan: whether memory and storage can be changed after purchase.
• Cost and availability: the verified price, and whether the machine can be bought from a manufacturer channel today.

Head-to-head against the criteria

Encoders. All three machines list hardware H.264 and HEVC encode. AV1 encode is where they split. Apple's page lists AV1 decode only. Intel lists AV1 encode for the Arc 140T in the NUC. NVIDIA's support matrix shows AV1 encode on its RTX 40 and RTX 50 generations and not on RTX 30, which is relevant to the ROG NUC because the 2025 model offers up to an RTX 5080 Laptop GPU. On the OBS side, a 2022 knowledge-base page says Apple VideoToolbox on Apple Silicon supports streaming with H.264 and recording to H.264, HEVC and ProRes. Whether current OBS can stream HEVC through VideoToolbox is unverified here. Quick Sync and NVENC are both listed for Windows.

Capture cards. OBS documents a Video Capture Device source on both Windows and macOS, and on Windows says devices need DirectShow output, which it states all major capture cards provide. Blackmagic and AJA device sources exist on both platforms. Elgato's Game Capture 4K X product page lists macOS 11 or later and Windows 10 or later, and says HDR capture is currently only available on Windows. Treat that as a vendor claim, and check the page again before buying any card.

Ports. The Mac mini offers three Thunderbolt ports plus two front USB-C ports at 10Gb/s. The NUC 15 Pro+ lists two Thunderbolt 4 ports, a front USB 3.2 Gen2x2 Type-C port, three USB 3.2 Gen2 Type-A ports in total and one USB 2.0 port. The ROG NUC lists one Thunderbolt 4 port and four USB 3.2 Gen 2 ports among others. All three have 2.5Gb Ethernet and Wi-Fi 7. The Mac mini alone lists a 10Gb Ethernet option.

NDI. NDI is not built into OBS. The DistroAV plugin, formerly OBS-NDI, requires OBS 31.1.1 or newer and NDI Runtime 6.3 or newer, and its README lists install routes for Windows and macOS, including Apple Silicon.

Size, cooling and noise. The Mac mini measures 12.7 by 12.7 by 5.0 cm, and Apple lists a 155W maximum continuous power draw and 5 dBA at idle. The NUC measures 14.4 by 11.2 by 4.18 cm and ships with a 120W adapter, or 150W for the Core Ultra 9. ASUS gives no acoustic figure. The ROG NUC is about 3 litres with three fans and a vapor chamber. Idle noise on the Mac mini is documented. Noise under a long OBS session is not documented for any of them.

Expandability. The NUC has two SO-DIMM slots with a 48GB maximum and two M.2 slots. ASUS also notes that the Arc graphics require two SO-DIMMs, so a single-stick configuration gives up the integrated GPU's full capability. The Mac mini sells memory and storage as build-to-order options and Macworld states they cannot be upgraded afterwards. The ROG NUC has SO-DIMM and M.2 slots, but its GPU is a laptop part, not a swappable card.

Scenarios

Console streamer with a USB capture card, 1080p60 H.264. Either machine can do the job on paper. The Mac mini is the quieter and smaller of the two on documented figures, and the NUC is the likelier saving once an ASUS price is confirmed. Pick the Mac mini if desk noise and footprint decide it, and the NUC if you want to reuse spare DDR5 SO-DIMMs and drives.

PC streamer adding an encode box to test AV1. Choose the NUC 15 Pro+, because Intel documents AV1 encode on its graphics and Apple does not list it. If you want AV1 encode from an NVIDIA part and can justify the size, the ROG NUC is the discrete-GPU route, with OBS 32.2.x requiring NVIDIA driver 570 or newer.

Church or venue with several NDI camera feeds. Both platforms can run DistroAV. The Mac mini brings three Thunderbolt ports and the 10Gb option, which helps if several high-bitrate feeds share one wire. The NUC allows simpler memory and storage changes. Whichever you choose, pin the OBS, plugin and NDI Runtime versions and test on wired Ethernet.

Streamer who needs HDR capture. Elgato's page says HDR capture is currently Windows only for the 4K X, which points to the NUC or ROG NUC. If you use a different card, check that vendor's own platform notes, which this desk did not read.

Budget builder eyeing a used Intel Mac mini. Skip it. The OBS 32.2.0 release notes describe Intel-based Macs being moved onto the Apple Silicon build, and macOS 12 support ended in 32.2.x, so older machines fall behind the current OBS.

Failure cases and a rehearsal checklist

On the Mac, the main risks are a destination that wants AV1 or specific HEVC ingest settings that the box cannot produce, a capture-card feature available only on Windows, and an OBS release that drops your macOS version. Apple dropped macOS 12 from OBS in 32.2.x, with 32.1.2 as the last build for it.

On the Windows machines, the risks are the Arc graphics running with a single memory stick, driver or Windows Update restarts during a show, and, on the ROG NUC, an NVIDIA driver older than 570 failing to meet current OBS requirements. Thermal throttling in a very small chassis is a plausible risk, but no source here measures it, so rehearsal is the only test.

On both, avoid plugin surprises. OBS 33.0 was in Beta 6 on 2026-10-02, with an overhauled plugin-loading scheme and removal of older Qt and FFmpeg support. Legacy plugin locations still load until 34.0. A production stream box belongs on stable 32.2.2 until 33.0 ships and your plugins are confirmed against it. The rehearsal below catches most of these problems before they happen on air.

• Install stable OBS 32.2.2 and confirm the operating system meets the download-page requirement.
• Connect the capture card to a direct port, not a hub, and confirm resolution and frame rate in the Video Capture Device source.
• Run the Auto Configuration Wizard, pick the hardware encoder (VideoToolbox, Quick Sync or NVENC), then record locally for 30 to 60 minutes at the final bitrate.
• Watch CPU, GPU and temperature during that recording, and listen for fan noise near your microphone.
• Stream privately or unlisted to the real destination for the full length of a show.
• If you use NDI, install NDI Runtime 6.3 or newer and DistroAV, then test every feed over wired Ethernet.
• Turn off automatic restarts and updates for show day, and keep a backup of your scene collection.
• Record the exact driver, OBS and plugin versions as a known-good snapshot.

Cost, availability and alternatives

Apple's published U.S. starting prices are $899 for the M6 Mac mini and $1,699 for the M5 Pro model, per the Apple newsroom posts of 2026-08-25 and 2026-09-22. Educational pricing is lower. Both are base configurations, and memory and storage upgrades are build-to-order.

No ASUS price is quoted here because none was verified on an official page on 2026-10-08. The ASUS eShop listing showed no price and was out of stock, so a buyer should expect to check retailers and confirm that memory, storage and Windows are included. A barebone unit needs all three. Retail pricing can differ from a manufacturer's price, and the same applies to the ROG NUC, whose price and availability were not confirmed either.

Credible alternatives exist. A single-PC setup using NVENC on a GeForce RTX 40 or 50 card avoids a second box entirely, if the gaming PC has headroom. The Mac Studio, which Apple announced alongside the new Mac mini, suits heavy multi-source production but is far more machine than a pure stream box needs. Dedicated hardware encoders and switchers are also an option, though this desk did not read their specifications and names them without claims.

Skip both machines if you stream from a console at 1080p to a single platform and the console's built-in streaming is enough, or if you already own a capable NVENC gaming PC and use one capture device.

Verdict

Choose the ASUS NUC 15 Pro+ when AV1 encode, Windows-only capture features such as Elgato's HDR capture, or a user-serviceable box rank above size and idle noise. Choose the Mac mini M6 when H.264 or HEVC delivery is enough, quiet idle operation and Thunderbolt matter, and the $899 starting price fits the budget. Move to the M5 Pro only if you need Thunderbolt 5 or more memory, since the documentation gives no encoder advantage for it.

Choose the ROG NUC (2025) only when you need an NVIDIA GPU for NVENC, AV1 encode from NVIDIA hardware, or occasional game duty, and accept a larger enclosure and an unconfirmed price.

Three findings would change this. A confirmed AV1 encode path on Apple hardware would remove the main reason to favour the NUC. A verified ASUS price well above the Mac mini would undercut the NUC's likely cost advantage. Independent measurements showing the NUC throttling under a long OBS session would shift the recommendation toward the Mac mini. None of these has been published in the sources reviewed.