I would give anything the go back in time two weeks and not install that OS. Nothing but trouble, and be aware that you can no longer back install to past OS. Particular problems with Adobe, especially Photoshop. Apple keeps pulling my warnings about this without explanation. My Apple Care is current, and I need this solved.
[Re-Titled by Moderator]
Original Title: Warning about Tahoe
Mac Pro, macOS 26.0
Please download and run Etrecheck. The free version is sufficient.
Copy and paste the results into your reply. Etrecheck is a diagnostic tool that was developed by one of the most respected users here in the ASC and recommended by Apple Support to provide a snapshot of the system and help identify the more obvious culprits that can adversely affect a Mac's performance.
Copy the report
and after clicking on the Reply button use the Additional Text button to paste the report in your reply.
Check Etrecheck's Privacy settings and make sure the checkbox for full disk access before running:
Then we can examine the report and see if we can determine the cause of the problem.
Please download and run Etrecheck. The free version is sufficient.
Copy and paste the results into your reply. Etrecheck is a diagnostic tool that was developed by one of the most respected users here in the ASC and recommended by Apple Support to provide a snapshot of the system and help identify the more obvious culprits that can adversely affect a Mac's performance.
Copy the report
and after clicking on the Reply button use the Additional Text button to paste the report in your reply.
Check Etrecheck's Privacy settings and make sure the checkbox for full disk access before running:
Then we can examine the report and see if we can determine the cause of the problem.
samsdadgraphics wrote:
I would give anything the go back in time two weeks and not install that OS. Nothing but trouble, and be aware that you can no longer back install to past OS. Particular problems with Adobe, especially Photoshop. Apple keeps pulling my warnings about this without explanation. My Apple Care is current, and I need this solved.
[Re-Titled by Moderator]
Original Title: Warning about Tahoe
Sure you can...Recovery (both M1/M2/M3/M4 and Intel) — How to reinstall macOS - Apple Support
options—
Create a bootable installer for macOS
Restore your Mac from a backup
Restore your Mac from a backup - Apple Support
Restore your User data from a backup using Time Machine
Restore your Mac from a backup - Apple Support
Before you go backwards:
for your third party app verify your software is up to date—if in doubt search the developers website or contact their: Support/Help/FAQ/Known issues/compatibility/updates…
Contact a third-party vendor - Apple Support
Contact a third-party vendor - Apple Support
Interesting discovery this morning. When I'm working with photos, I almost always open the file from Bridge. This morning, I rebooted and launch PS but did not launch Bridge, opened two jpegs from the finder instead, and PS is so far behaving normally. Haven't worked with this much, but did some generative expand and cropping and so far so good. Could this be a Bridge problem, and do you have any recommendations for me?
samsdadgraphics wrote:
Interesting discovery this morning. When I'm working with photos, I almost always open the file from Bridge. This morning, I rebooted and launch PS but did not launch Bridge, opened two jpegs from the finder instead, and PS is so far behaving normally. Haven't worked with this much, but did some generative expand and cropping and so far so good.
Could this be a Bridge problem, and do you have any recommendations for me?
Sure sounds like a Bridge issue (?)
the advise is the same, for your third party app search the developers website if in doubt.
ref: Photoshop is not opening files from Bridge - Adobe Community
Run Etrecheck and paste the full report in your reply as outlined in my post above.
Do you have any external drives? If you do are you using it for the cache/swap files for Photoshop?
If not how much free space do you have on your boot drive and how much RAM do you have?
Have you installed and run any "cleaning", "optimizing", "speed-up", anti-virus or VPN apps on your Mac?
samsdadgraphics wrote:
I would give anything the go back in time two weeks and not install that OS. Nothing but trouble, and be aware that you can no longer back install to past OS. Particular problems with Adobe, especially Photoshop. Apple keeps pulling my warnings about this without explanation. My Apple Care is current, and I need this solved.
[Re-Titled by Moderator]
Original Title: Warning about Tahoe
From your Etrecheck report:
disk3s5 - Data [APFS Virtual drive]
Filesystem: APFS
Mount point: /System/Volumes/Data
Encrypted
Used: 953.08 GB
Shared values
Size: 994.66 GB
Free: 19.86 GB
You have only 20 GB free out of 1000 GB, which is 2% free, there should be at least 15% free space, this is especially important for Adobe apps like Photoshop, Lightroom, as not only do they generate a lot of disk space usage for scratch space, they also require lots of space for virtual paging to disk.
Also this
disk5 - Drobo 5D - TB 17.59 TB
External SCSI
disk5s1 - EFI (MS-DOS FAT32) [EFI] 210 MB
disk5s2 - B***********e (Mac OS Extended) 17.59 TB (17.22 TB used)
Not sure what this is being used for but it is also 98% full, likely to cause slowing and thrashing about.
The performance numbers for your drive are also concerning:
Performance:
System Load: 10.74 (1 min ago) 5.60 (5 min ago) 4.71 (15 min ago)
Nominal I/O usage: 0.42 MB/s
File system: 9.60 seconds
Write speed: 1712 MB/s
Read speed: 4265 MB/s
The write speed is much slower than read speed, this should not be so different. On my 2019 MacBook Pro, which I would expect to be much slower than your Mac Pro, I get 3000 MB/s for both read and write. Usually those numbers are very similar. Yours might be lower because of a hardware issue or maybe because of the low disk space.
Looking through that report one thing leaps out:
There are a large number of system modifications running in the background.
Given that I have no issue opening either app, that might be a place to start. As always, for best help with 3rd party apps, the place to start is with the makers of the app - after all you're paying Adobe money every month.
What Photoshop? The current version of Photoshop CC is running fine with Tahoe. If you have an old version of a perpetual license or an older Elements, that’s not Apple’s fault for updating macOS.
Always make sure your critical software is compatible with a new OS before you update.
Not for me. Do you have extensions/plug-ins that may be causing issues? I run PS pretty clean, I have the Nik plugins but that’s pretty much it.
Again this is 3rd party software (and in one of your other posts in the thread you mention 3rd party hardware). The best place to get assistance with 3rd party products is from the makers of those products. They're the ones who know these apps best. After all, you're paying a monthly subscription to Adobe for this software, and that is why they have forums and a large customer support department.
WHat's the problem with Photoshop? And what version? And as it's a 3rd party app your best seeking assistance from the makers - Adobe. FWIW the current versions run fine here
I have noticed that the performance changes over time like there is a memory leak or something happening in the background. I end up having to restart my computer which fixes things for a while. Definitely something new introduced with the OS update. I didn't have this problem before.
Everything is current on both sides Neuro, and I know. I've been working with Apple equipment for decades, and I never update to a new OS. Always wait for .2 or .3. Screwed-up this time, and I'm being punished severely.
I am experiencing general slow performance in opening files and then it is showing up as a long lag when using a tablet. I am using an Xeance Labs tablet and updated drivers to 1.3.5-89. It seems to be a brush compatibility issue as I can select different brushes with lower point numbers like a smoke brush and the lag is not always present. However when I use the pressure sensitive brush for opacity and flow the brush strokes appear about 1-2 seconds after I have painted. It also seems to not be accepting the pressure sensitivity. While this is a photoshop thread I am also experiencing significant slow downs with Lightroom and copy and pasting settings between images that I have never experienced before.
Pushing the issue — Photoshop is lagging after macOS Tahoe 26.0 update, its essentially unusable. Updated PS to Version 26.11. Still didn't make a difference. Clicks aren't registering, hanging up on tool changes, buffering on everything. In comparison, Illustrator runs just fine with no issues.
Adobe Photoshop issues after macOS Tahoe installation
