macOS 15 Sequoia on Unsupported Macs Thread

[chevyboy60013]

From what I have gathered, it looks like on a 2018 MacBook Air, it is still not possible to install sequoia on it due to the T2 chip?

 

[Bigwaff]

From what I have gathered, it looks like on a 2018 MacBook Air, it is still not possible to install sequoia on it due to the T2 chip?

OCLP does not support Macs with T2 chip.

 

[chevyboy60013]

OCLP does not support Macs with T2 chip.

Hopefully they will soon, however Sonoma works well and does what I want it to... just would be nice to have the latest.

 

[Adora]

New RC released:

Edit: It's (24G617) now.

 

[lesliewong]

In my (mid 2012 MBPr, 10,1) System/General/Software Update offered 24G617, (I was on 24G612) so I downloaded it, installed and ran OCLP.

Seems to be running okay.

I have a LG 4K display (two HDMI inputs and one DisplayPort) for my PC and I was never able to get the MBP to work with it. So today I spent the afternoon trying to get it to work:

MacBookPro10,1
LG 32UN550-W 4k display
Metal Family: Supported, Metal 2
System Settings > Battery disabled Automatic Graphics Switching to force NVIDIA GT 650M
HDMI to HDMI cable didn’t show a second display connected in Display settings
Mini DisplayPort (mDP) to DisplayPort (DP) showed a second display connected in Display settings but the LG had a black screen
Reset PRAM
FeatureUnlock in OCLP set to None
LG Settings>Picture > Game Adjust > HDMI Ultra HD Deep Color Off
Refresh Rate 30Hz

Two settings in BetterDisplay worked:
Turn off High Resolution HiDPI
Set refresh rate to 60 Hz
1920x1080

Ran out of energy before trying other resolutions or with the cover closed.

 

[Adora]

Safari 26.4 Beta 3:

https://swcdn.apple.com/content/downloads/00/60/047-88544-A_SU1Z0BLMLX/6njieb9z9cc1x2t7jazfqjfsnzq1iya9iy/Safari26.4SequoiaAutoSeed.pkg

 

[Adora]

15.7.5 (24G617) full installer:

https://swcdn.apple.com/content/downloads/22/62/047-88343-A_DTALRSRUUL/081xz88zzv21ymehofv353yfcuu97pfnx6/InstallAssistant.pkg

 

[houser]

15.7.5 (24G617) full installer:

Nice if we can please indicate if it is a beta/RC or release etc. FWIW.

 

[rehkram]

Nice if we can please indicate if it is a beta/RC or release etc. FWIW.

It's an RC, #3 I would think. I have it installed on both Macs here, no issues.

 

[LookingOut]

Have you tried simply leaving the installer alone for some time (maybe even an hour)…? The Adobe Acrobat installer can often be very slow…

I left it for around 15 min several times. I am just going to stick with Preview.

 

[makra]

I’ve come to the same conclusion. Just going to stick with Preview. I wanted to try Acrobat Reader to see if I could extract pages out from a document. I found an online solution for this task.

Preview does that too. Just drag from the side bar to the finder...

 

[Adora]

Nice if we can please indicate if it is a beta/RC or release etc. FWIW.

Yes it's RC3.

Available build 24G607 (Release Candidate)
Available build 24G612 (Release Candidate 2)
Available build 24G617 (Release Candidate 3)
https://betawiki.net/wiki/MacOS_Sequoia#15.7.5

There is a new RC with every new Beta of 26.4. As it was before with 26.3 + 15.7.4 and 26.2 + 15.7.3 and so on...

There never is a Beta it always starts with an RC. I think it's finished from the beginning and they just wait for the next final point update of Tahoe to release it publicly for whatever reason. I guess they only fix tiny stuff or security issues in a new RC, if at all.

The same is happening with Sonoma.

Also a new Safari 26.x Beta is released separately on the same day, but it doesn't need the latest version.

To get a new RC and Safari 26.x Betas via Software Update, Developer Betas have to be activated what also won't offer you annoying Tahoe updates anymore.

If there is no option for beta updates or just Public Betas you need to login once to the Apple Developer website with your Apple-ID and create a free profile. Just accept the terms and skip everything after that. Then also those hidden download links for Safari Betas next to the Technology Preview are working for you. To register just click on view downloads or this icon on that website for example:

https://developer.apple.com/safari/resources/


There is also this Terminal command to show the Beta update options, but I never tested it:

open "x-apple.systempreferences:com.apple.Software-Update-Settings.extension?action=showBetaUpdates"

 

[MacMorrison]

macOS 15.7.5 got released inadvertently: https://eclecticlight.co/2026/03/05/has-apple-suffered-a-premature-release/

 

[K two]

macOS 15.7.5 installed atop 15.7.4 OTA, OCLP 2.5.0n, runs as expected.👏
👍

 

[josehill]

Anyone else having issues with Adobe Acrobat Reader (latest release version 25.001.21223) indefinitely hanging during installation, makes it to the one minute left to go mark.

I've seen the same issue with Acrobat 2020 for a little while. I'm not sure exactly when the problem started, but I'm pretty sure it was one of the Sequoia releases.

 

[BradleyinDC]

macOS 15.7.5 got released inadvertently: https://eclecticlight.co/2026/03/05/has-apple-suffered-a-premature-release/

 

[thegdn]

nice... still cruisin.

 

[LookingOut]

Preview does that too. Just drag from the side bar to the finder...

Thank You!
Never occurred to me to look there, rarely have the sidebar open displaying the thumbnails or contact sheet. I was pecking around the menu, tool bar and looking for a keyboard command.

 

[rehkram]

Sequoia 15.7.5 (24G623) is designated RC4 by the way. Currently installed here on one supported Mac, downloading to the unsupported one.

 

[K two]

Sequoia 15.7.5 (24G623) is designated RC4 by the way. Currently installed here on one supported Mac, downloading to the unsupported one.

Showed up here as the final, on Software Update. 🙌 And since updating to 15.7.5 Tahoe is no longer offered on Software Update. 🙃

 

[LookingOut]

Guys, don't you think it's better to wait for a new version of the KDK to be released before updating macOS via OTA? For example, I'm still using macOS 15.7.3 because the latest KDK available is for that version.

I found this bit info on how KDKs are not always updated with point releases and security updates. It is kernel dependent. I just OTA'ed to 15.7.4 without the non existing matching KDK. Everything functions as expected.

Here is the link to the developer page - https://developer.apple.com/forums/thread/796371

 

[basslik]

Every time I've updated, OCLP always found the correct KDKs before installing.

That is not the case now?

 

[TOM1211]

Anyone sync music to there iPhone my album art went all over the place anyone use a third party app instead of the music app ? First time it’s happened , I deleted all music on my phone which was a terrible idea because it synced back worse .

 

[Larsvonhier]

Just found out that for non-AVX2 based machines (like cMP3,1 to 5,1 with their Xeons) Safari browsing without frequent crashing and page reloading can be restored by going back to Safari 18.6. Interestingly, the version stated for Sonoma works very well on Sequoia, while newer ones do not.
See DL link here, thanks to the full installer web-listing by Mr. Macintosh.

 

[K two]

This popped-up on Software Update this PM.
macOS 15.7.5 installed atop 15.7.5 OTA, OCLP 2.5.0n, runs as expected. Build #24G624.
👍