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Apple Seeds Fourth Beta of macOS Tahoe to Developers

I installed it without any issues.(M4Pro MacbookPro)
However, Safari remains my main dealbreaker. It looks and feels like a complete mess.
The user experience of Liquid Ass with much useless noise continues to be a nightmare.
The rest of the OS user interface feels slightly more polished with clearer separation of Hierarchie, but it’s still far from being “beautiful” and ready for release. #beta
 
AUGUSTU5 said:
I installed it without any issues.(M4Pro MacbookPro)
However, Safari remains my main dealbreaker. It looks and feels like a complete mess.
The user experience of Liquid Ass with much useless noise continues to be a nightmare.
The rest of the OS user interface feels slightly more polished with clearer separation of Hierarchie, but it’s still far from being “beautiful” and ready for release. #beta
Click to expand...
Interestingly, some apps (e.g., TradingView) that utilize GPU acceleration appear to be quite sensitive to changes in either the GPU Pipeline or the Rendering Pipeline itself with beta 4.
Introduced with this beta, frame pacing and animation glitches seem to be occurring when the system is rendering TradingView in the foreground, even when the systems not under any other load. (Moving any window / Animating anything in the UI lags with at max ca. 25FPS)

And yes, Feedback will be submitted. Just pointing it out for the community that GPU Hardware Acceleration might be buggy in this build.
 
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My personal opinion, it still looks bland - some of the best looking IMO versions of macOS were before this whole flatness, and garish colors were implemented - 10.8 was the last classy and good looking version...

10-8-Mountain-Lion-Desktop.png


Compare that to what we have now...it's just ugh...ugly....and I wish I could go back and use all the apps I need on that 10.8 system.

1753210375675.png
 
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jsalicru said:
Installed, but now there's no more external monitor output...
Click to expand...
I haven’t encountered this issue myself. Perhaps restarting the computer might help.

However, I’ve already booted back into Sonoma. It’s unusual for me to skip the latest buggy release in Mac OS betas, but this one is simply too much for my patience. Lake Tahoe can sink right where it ships around.

It’s not even the “bugginess” that bothers me, but the UX nightmare. Every screen and UI element is just another adjective of “noise” due to the constant “bubble bubble” everywhere. That bubble water UI looks so outdated, like something from the 2013 Samsung or Vista Era. Even if there are more graphical-intensive animations, it just looks all off and uncooked. The UI elements are nothing what I expect from a desktop OS. Readability is so awful in the entire OS… man, can’t even argue a positive aspect of the UI overhaul xP
 
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Removed Rosetta for Beta 2 to 3. Beta 4 showed up immediately - but got an error 3 times after the verification and then suddenly just worked. Definitely more GLASS and loving it!
 
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build is 25A5316i, same one that was accidentally released yesterday, then pulled

so now they re-release same build? then why pull it in the first place?

others released today:

iOS 26 beta 4 (23A5297i)
iPadOS 26 beta 4 (23A5297i)
tvOS 26 beta 4 (23J5316g)
audioOS 26 beta 4 (23J5316g)
visionOS 26 beta 4 (23M5300g)
watchOS 26 beta 4 (23R5317g)

this concurs with macrumors prediction yesterday: https://www.macrumors.com/2025/07/21/ios-26-public-beta-appears-imminent/
 
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xnsys said:
My personal opinion, it still looks bland - some of the best looking IMO versions of macOS were before this whole flatness, and garish colors were implemented - 10.8 was the last classy and good looking version...

10-8-Mountain-Lion-Desktop.png


Compare that to what we have now...it's just ugh...ugly....and I wish I could go back and use all the apps I need on that 10.8 system.

View attachment 2530908
Click to expand...
Hard disagree. On the the old version you posted the dock looks like something you would get today on a $6 MP3 player from China... The menu bar looks like the ones we had on our middle school Macs in the late 90s. The desktop icon looks like something from a no longer maintained Linux distro. Not only does each element look bad and extremely dated on their own, but combined as a whole they don't even match with each other, which gives a off bad modern Windows vibe where UI is patched together with different styles from different decades. I'll give the wall paper a pass. Ya'll got to let your nostalgia go. Apple rocking something like that today would be like these 30 year old moms and dads that go out in public with full emo attire and embarrass their kids. It's awkward and garish. My apologies for being blunt. It is charming. I would enjoy using a UI like that to browse old websites.. but it has no place in the modern world as a serious UI style. The main stream does not embrace tacky unless the tackiness is intentionally ironic.
 
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Gene Steinberg said:
Where to find?
Click to expand...
you can run this in terminal to reveal link:

Code: 
for file in $(curl -# https://swscan.apple.com/content/catalogs/others/index-26seed-1.sucatalog | grep com_apple_MobileAsset_MacSoftwareUpdate.plist | grep -Evw '(com_apple_MobileAsset_MacSoftwareUpdate.plist.integrityDataV1)' | sed -e s/"<string>"//g -e s/"<\/string>"//g -e s/\ //g); do
curl -s $file | egrep -A 1 -m 2 '(>Build<|OSVersion)' | sed -e s/"<string>"//g -e s/"<\/string>"//g -e s/\ //g | sed -e s/"<key>"//g -e s/"<\/key>"//g -e s/\ //g
echo $file | sed -e "s/com_apple_MobileAsset_MacSoftwareUpdate.plist/InstallAssistant.pkg/g"
done

then it shows

Code: 
            Build
            25A5316i
--
            OSVersion
            26.0
https://swcdn.apple.com/content/downloads/05/26/082-89906-A_7DP8EBEVZJ/g3p7sya93v36h1ri0h940xxuxutt23igcw/InstallAssistant.pkg

for beta 4
 
Gene Steinberg said:
Where to find?
Click to expand...
tywebb13 said:
you can run this in terminal to reveal link:

Code: 
for file in $(curl -# https://swscan.apple.com/content/catalogs/others/index-26seed-1.sucatalog | grep com_apple_MobileAsset_MacSoftwareUpdate.plist | grep -Evw '(com_apple_MobileAsset_MacSoftwareUpdate.plist.integrityDataV1)' | sed -e s/"<string>"//g -e s/"<\/string>"//g -e s/\ //g); do
curl -s $file | egrep -A 1 -m 2 '(>Build<|OSVersion)' | sed -e s/"<string>"//g -e s/"<\/string>"//g -e s/\ //g | sed -e s/"<key>"//g -e s/"<\/key>"//g -e s/\ //g
echo $file | sed -e "s/com_apple_MobileAsset_MacSoftwareUpdate.plist/InstallAssistant.pkg/g"
done

then it shows

Code: 
            Build
            25A5316i
--
            OSVersion
            26.0
https://swcdn.apple.com/content/downloads/05/26/082-89906-A_7DP8EBEVZJ/g3p7sya93v36h1ri0h940xxuxutt23igcw/InstallAssistant.pkg

for beta 4
Click to expand...
Got it. Now how does one use it to install the beta? I installed the assistant, but I cannot find where it was placed.
 
xnsys said:
My personal opinion, it still looks bland - some of the best looking IMO versions of macOS were before this whole flatness, and garish colors were implemented - 10.8 was the last classy and good looking version...

10-8-Mountain-Lion-Desktop.png


Compare that to what we have now...it's just ugh...ugly....and I wish I could go back and use all the apps I need on that 10.8 system.

View attachment 2530908
Click to expand...
Couldn't agree more... I wish Apple would give us a couple Themes, that could transport you back to older versions.
 
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