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Level 1

34 points

Extremely slow external SSD read and write speed after Ventura update - MacBook Pro 16 M1 Max

Machine = MacBook Pro 16 M1 Max.

Since the Ventura update all my external drives are transferring at around 5-30MB/s down from around 800-900MB/s. I have a mix of Crucial, Samsung, and Kingston SSD drives which they all have the same problem.

Reinstalled the Ventura update with support, did not help, all drives have been tested on an identical MacBook Pro running Monterey and they work as normal.

Im struggling to make a Time Machine backup as it keeps failing, and transferring to my backup drive takes an extremely long time.

I work in Video, and its brought all my apps to a crawl as the read write speed is so slow. This is affecting my work, so help would be greatly appreciated.

1, has anyone had this problem?

2, how easy is it to go back to Monterey as this laptop is critical for my work,

3, any possible solutions?

MacBook Pro 16″, macOS 13.0

Posted on Oct 26, 2022 12:43 AM

Best reply

muzammilpeer987

Level 1

4 points

Posted on Oct 1, 2023 2:57 PM

This issue still exist in Macos Sonama tried with 1tb ssd previouly it was transfererring data at 500mb/sec now it move to 40mb/sec cap, M2 Max 32gb ram 16inch macbook pro, Please help

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56 replies

Mar 1, 2023 2:01 AM in response to dawepr

Unfortunately doesn't work for me ;( (steps 2 and 3 there is no open app on my end) I also made new user and no help :( any other solutions anyone?

Mar 1, 2023 5:22 AM in response to bmiraflo

Did you install Monterey ? Did it help?

Mar 1, 2023 6:38 AM in response to LVLeleven

Even clean install of monterey did not solve the problem on my end :(

Mar 1, 2023 6:55 AM in response to dawepr

I've wiped my mac and downgraded to Monterey and it still is the same :(

threiner

Level 1

4 points

Mar 1, 2023 8:37 PM in response to Skateshopusd

it seems apple dont care about this :-(

tbirdvet

Level 6

13,731 points

Mar 16, 2023 6:12 AM in response to Skateshopusd

Just retested my drives which are WD NVME drives in a USB3 enclosure and a TB enclosure. All show speeds to spec with Monterey and about 10% slower with Ventura. So no real issue on this end.

savita88

Level 1

80 points

Mar 24, 2023 11:52 PM in response to LVLeleven

I have both Ventura and Monterey on M1 Macbook Pro (Ventura) and M1 Air and I tried Sandisk and Samsung T7 and actually the write/read speed is a bit slower on Monterey ..

Apr 21, 2023 8:52 PM in response to LVLeleven

Had the same problem so changed out the USB-C cable for a Thunderbolt cable and now Sandisk Extreme is back up to speed.

tbirdvet

Level 6

13,731 points

Jul 24, 2023 5:03 PM in response to bmiraflo

Others have reported speed issues with the Samsung 980 when using Macs for some reason. I have WD NVME Black or blue drives that work at advertised speeds.

threiner

Level 1

4 points

Sep 16, 2023 10:08 AM in response to tbirdvet

What e closure you are using?

tbirdvet

Level 6

13,731 points

Sep 16, 2023 4:56 PM in response to threiner

I have one that uses a Trebleet and one that uses Acacis

Extremely slow external SSD read and write speed after Ventura update - MacBook Pro 16 M1 Max