Has Sequoia finally resolved the PCIE M.2 NVME mounting issues so many faced?

I think the issue being discussed here in an issue where softRAID can not recognize drives, and AppleRAid has some trouble.

Problems with plain Disk Utility are likely caused by something else.

Readers have reported that drives that rely on Promise Drivers may need those drivers, or slightly different version, installed manually, as the version included in MacOS is stale.

Be sure to check with the card vendor for direct guidance on what Drivers might be needed for Sequoia.

OWC says they think its fixed.

consider that you may have a different or more complex problem.

Apple does not Act on what is Witten here -- you need to contact support or write them a note on product feedback page.

I have a 2023 Mac Pro, and updating to Sequoia has not resolved the internal PCIe random non-mounting on startup issue for me.

The issue was previously occurring for me on every other startup on both Monterey and Ventura, and if anything it's now worse on Sequoia - it took me about 10 startups this morning before the drives mounted. The issue has happened when using both OWC and Sonnet cards, so it's definitely still an issue with the computer rather than the cards.

To spend this much money on a supposedly top of the range Apple computer for it to not work properly (with the PCIe cards recommended in its own promo material!) is pretty atrocious. The PCIe buses are pretty much the only extra thing that the Mac Pro even has over Mac Studio, so at least have it working correctly.

Apple can not act on only your words, and they are not reading the words you write HERE on the User-to-User forums.

if you want resolution, you need to contact Apple support, work with them on obvious possible problems, and if not resolved, ask a specialist to contact you, and continue to work with an Apple support specialist.

Resolution is either solving the problem, or filing a formal, numbered, tracked, Bug Report. You need to provide them with enough information that they can un-ambiguously re-create the problem in a test system in their labs. Then they can instrument that system, determine what the issues might be, and move to resolve them.

It's not like mine is a one-off case. The inconsistency in the drives mounting is a widely recognised and reported issue both with 2019 and 2023 Mac Pro's. I'm not spending a load of extra hours essentially being a tester on behalf of Apple - if they've had that long to sort the issue, my single report isn't going to change anything.

You can easily send them a product feedback report in only a few minutes, without even mussing your hair:

Product Feedback - Apple

they read these, but make no promise to respond to you directly.

I'd like to know too, specifically for the MacPro 2019

This page is saying yes - https://eshop.macsales.com/blog/96473-macos-15-sequoia-2019-mac-pro/.

I just upgraded and my NVME is no longer accessible... I think the problem still persists... I am using an Insignia NVME enclosure from Best Buy

which Driver are you using with it? {AppleRaid, SoftRAID, Disk Utility (plain), other}

Plain disk utility...

I can confirm the issue still exists. Apple should provide an solution as soon as possible. Might be the next update.

Ok, that's easy enough. I've sent a summary of the issue to them, but I won't hold my breath!