Using this AS WE SPEAK WITH MAC OSX running Ventura
I have read online that others are using with Sonoma with no issues

PERFECT! and FAST! FAST! FAST! 20Gss thunderbolt connection Drobo, hot swap-able, beyond RAID, better than NAS 
Please note drives not included
In beautiful condition, 
and in fully functioning state 
with original box and power cables.

Drobo 5DT - Turbo edition
With optional mSATA card Accelerator Bay - for even faster read / write
This unit includes an after market mSATA 128GB Solid State Drive card to boost read / ride speeds
$400 value which is ioncluded in the price

Like new and fully working but without warranty. In original box with original power cable power adapter, and thunderbolt cable
(Thunderbolt 2 cable that I purchased separately).

Easy: Ready to use.
Just plug in 5 drives of any size up to 70TB total and 14TB per drive and turn it on, it will automatically erase drives and format into a large array ready to use. Download the management app from Drobo.com, here you can set you're drobo to have 1 disc or 2 disc failure safety to insure you never lose your data.

Huge: Up to 70TB capacity
Great storage and media server for editing and archive
In perfect working and cosmetic condition. This unit was used until December of 2023 with 5 x 12 TB Seagate drives (not included) and worked perfectly as our media server for video editing and storage, we just replace this with an 8 bay unit and moved the Seagates drive to that and selling this unit.

Fast: Connectivity 20Gbs
Faster than Synology and many other ethernet NAS
2x Thunderbolt2 with speeds of up to 20Gb per second data transfer
** that's faster than ethernet which has just 1Gb per second
** and faster than USBC 3.1 (which has 10Gb per second)
Also includes a USB3.1 type B port

Beyond-RAID: Put in any size drive up to 14TB
Put in two 8TB and three 12TB, if one drive goes out just hot-swap it with another with out any downtime
You can set up to have 1 drive or 2 drive redundancy
Meaning up to 2 drives can fail simultaneously and you don't lose your data

Please note: NO hard drives are included in this enclosure.
Works with or with out Drobo dashboard.
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About Drobo (from B&H Photo)
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"If you haven't heard of the Drobo, you're probably not being as productive as you could be. The Drobo 5D is one of the easiest to use, simplest to maintain, and most effective enclosure bays in its field of data storage. The Drobo 5D offers room for up to five 3.5" SATA I/II/III drives and one mSATA solid state drive (drives sold separately). It handles drives from any manufacturer, at any capacity, spindle speed, and cache. You can add drives on the go—hot-swapping drives is not a problem for the Drobo 5D.

But what puts this unit ahead in the storage game are the dual Thunderbolt 2 ports (Thunderbolt 2 cable sold separately). We've talked about Thunderbolt 2 before—it's 25 x faster than USB 2.0—and its data transfer rates almost approach warp speed, but more importantly, for disk arrays of this size, it reliably and safely transfers big-project data across multiple disks. Imagine having to put a crucial 200GB file on a USB 2.0 drive, as you're late for an important meeting and running out the door. You'll be delayed for ten minutes or more, trust us. The same crucial information on a Thunderbolt 2 attached drive—20 seconds.

You can also daisy-chain up to six Thunderbolt 2 devices and/or a non-Thunderbolt monitor at the end of the chain. And, the bi-directional 20 Gbps performance of Thunderbolt 2 allows all devices in the chain to achieve maximum throughput.

But Thunderbolt 2 isn't the only option. The Drobo 5D also sports USB 3.0 connections, which is still 12 x above the transfer rates for USB 2.0. This interface allows PC users to utilize the power of the Drobo 5D right out of the box.

The Drobo 5D also uses their proprietary Data-Aware Tiering technology, usually reserved for business-class storage solutions, but also available in this desktop Drobo. It intelligently uses the high-performance flash in SSDs to accelerate performance of the storage array, allowing applications such as Adobe Premiere and Apple Aperture fast access to data. If you want a total, all-out speed/storage solution, you could load all the bays with solid state drives that are faster than spinning-based drives.

And the Drobo 5D is built on the BeyondRAID technology, which features single- or dual-drive redundancy. This added layer of protection will create mirrors of one drive so that you'll always have a backup. Paired with the ability to hot-swap drives, this conceivably allows you to formulate a game plan on the fly in the case of a drive failure or power outage.

Speaking of power outages, the Drobo 5D also includes a battery backup for all data in memory or cache, - anything on its way to the drives, in other words.

The design of the unit has you in mind as well—it's sleek, sturdy, and has a carrierless drive-bay design so that hard drives fit closer to each other, and the unit houses a significantly quieter variable-speed cooling fan.
The Drobo 5D is the perfect choice for content managers or data archivists that need speed and performance and room in one easy-to-use desktop enclosure.

BeyondRAID Technology
BeyondRaid Technology features single- or dual-drive redundancy. This added layer of protection will create mirrors of one drive so that you'll always have a backup.
Data Aware Tiering
Data-Aware Tiering technology, usually reserved for business-class storage solutions, is also available in this portable Drobo. It intelligently uses the high-performance flash in SSDs to accelerate performance of the storage array, allowing applications such as Adobe Premiere and Apple Aperture fast access to data.

Thunderbolt 2 and USB 3.0
The Drobo 5D is equipped with dual Thunderbolt 2 ports for daisy chaining. Connect up to six Thunderbolt 2 devices and/or a non-Thunderbolt monitor at the end of the chain. This allows even the most portable laptop computers access to high-performance storage while retaining connectivity to other devices and an external monitor. Drobo is the only storage array that offers Thunderbolt 2 and USB 3.0. This latest USB also offers high-performance connectivity and is backward compatibility with computers running compatible versions of Mac OS X or Windows, including macOS High Sierra.

Quiet
Drobo 5D is also significantly quieter than previous-generation Drobos due to its tuned, large, variable-speed cooling fan. You can even configure Drobo to spin down drives when they're not in use to further reduce noise and save energy.