Extremely slow file transfer speeds on OS Ventura

File copies over the network with Ventura are painfully slow. Files will take 30 seconds to start copying, and then at the end of the copy it hangs for about 3 minutes. Happening on a Mac Studio Pro and a Mac Pro M1 laptop. Other machines don't have this issue running Monterey.

This horrific bug has returned and I also am experiencing this horrific atrocious files transfer speeds

after Updating to 13.4 ! On my M1 MBAir.

12 Hours ! to transfer from a PNY SSD that reads at 350-400MBps to a Thunderbolt 3 NVME SSD drive that writes at 1TBps! Give me a break Apple!

Black Magic Disk Speed test confirm the speeds of my drives are fully functional.

So what is the major malfunction here?

Yes same problem here, normal Samsung T7 1TB macOS VenturaThen I bought shield version and got these speeds.

And both drives should give up to 1000mbs read/write speeds.

My normal t7 use to give those speeds with monterey!

Any solution for these or do we just wait until September for next OS?

Pleeeeease!!

I am running 13.4.1 on a M1 MacBook Pro, with Samsung T7 drive and it is version slow, and appears to be very heavy on the CPU (efficiency cores maxed out), I am using CCC to backup and this normally would take 15 to 20 mins, it took 7 hours today.

Tried turning off spotlight and anti virus etc and still SLOOOOOOW...

I am now backing up my development directory (updates only) and this has take 28 mins so far.

I think it started back when I upgraded to Ventura. I have not done may backups to SSD for the last 6 months because of this as I can't do anything while it is backing up.

It is absolutely horrendous.

Hello all

I have to save the same file again to another USB.

188 days for 24 GB.

Before I started the copy I had to remove all the contains from the USB to HD. 2.4GB. It took 23 secs.

Then I started the new copy.

While I was writing this post. I when back to look. (about 5-10 mins had pasted)

The speed has increased and the time has decreased to less than 1 hr.

Looks to me like the system is doing an initial calculation and then once it gets over it it speeds up.

And now it's down to 43 mins.

I'm experiencing the same problem. Transfer speeds significantly slowed after the Ventura update.

What kind of speed do you get to an EHD that's formatted APFS?

Maybe a T7 issue with your unit. We've got 13 T7s attached to five Macs and all run exactly as expected: USB-A around 450-480 MBps; USB-C 900+ MBps

Same problem here!

Ever since I updated to macOS Ventura, the transfer speed/write speed to external drives have dropped significantly. It takes almost 4hours to copy 1GB. It would be great if someone could come up with a fix before the next update.

make-me-happy wrote:

That's because I'm not really trying to get the issue solved

Then you're in the wrong place. This is a user-to-user tech support forum for Apple products. If you are here for some other purpose, you are likely to be disappointed.

Both are exFAT drives...formatting the drive is absolutely out of the question because I need the data on them.

Well there goes that idea. To double-down on what I said above, if one of your restrictions is that you can't actually make any changes, then there is nothing anyone here can do for you.

Probably the only thing we can do is try to reproduce what you are seeing. I just happen to have a Samsung T7 that is not exFAT. I get about 650 MB/s on the Intel Ventura MBP, about what I would expect. My newer M1 MBP gets slightly faster speeds, but then it is also a faster machine.

make-me-happy wrote:

A senior Apple technician directed me to encourage people who are experiencing this problem to make a bug report. That is literally what this thread is doing.

You didn't talk to any senior Apple technician. You talked to someone at Apple support. If your problem isn't described in some existing Apple support document, they are just going to kick you to the curb like this.

Why are you starting fights and then getting butthurt when people call you out on it? I've never seen anyone be as rude as you for not using a forum in the exact way you would prefer. Totally bizarre behaviour, utterly tedious.

You want to know what's tedious? Dealing with responses like yours, time after time, year after year.

Never called you names.

I'll quote you - "Wow, this is the first narky comment I’ve seen on this forum, congratulations."

Please stop commenting here

Happy to do it. I've told you exactly what you need to do to get this problem fixed. You can do that if you want, but without me helping you. Or you can just sit on your hands, like so many before you, and hope a fix magically arrives one day. macOS 14 will be released in just about six months from now. If there ever is a fix, that is where you'll see it. Enjoy the wait.