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what worked for me was reinstalling the profile to get the installer to finish downloading. Once you’ve got the installer boot into safe mode by holding the shift key. Then run the installer.
 
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What seems to have worked for me was going to Advanced from the Software Update pane, unchecking everything. The click Install Update again. This time no error and it went through
2019 15” MBP w TB, i9
 
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worked flawlessly on my MacBook Pro 2018 but in the music app there are still most of the album covers missing

Same issue here also with TV app. Was hoping this would be fixed by now, if I click on the three dots and go "Get Info" the artwork can be seen there under "Artwork".
 
On a 2018 TouchBar MBP and was having the same issues as others here.

Looking at the timestamps in /Library/Updates/041-81733 it appears Apple just pushed an update to BridgeOSBrain.pkg (around 15:48 PST.. I'd downloaded the rest of the files around 15:20 PST and received the same error).

If you open the Software Update control panel again and click "Update Now" the upgrade should kick off as you'd expect. My machine just rebooted and is upgrading with no special hacking/changes to start it..
 
On a 2018 TouchBar MBP and was having the same issues as others here.

Looking at the timestamps in /Library/Updates/041-81733 it appears Apple just pushed an update to BridgeOSBrain.pkg (around 15:48 PST.. I'd downloaded the rest of the files around 15:20 PST and received the same error).

If you open the Software Update control panel again and click "Update Now" the upgrade should kick off as you'd expect. My machine just rebooted and is upgrading with no special hacking/changes to start it..

Yep the changes just got thru and I am into the actual install finally without any further ado. They must have got the update to the offending package I agree
 
I see no benefit in using APFS for time machine.
Some features as Copy-On-Write and Cloning are even disqualifying APFS as a file system for backups.

Do you mean that Apple will continue using HFS+ for Time Machine in the future. Check out this:

Catalina, Read-only System Volume, and HFS is getting out of the system business
Allow me to be the first to say it: stick a fork in it, HFS is done. HFS simply won't work for making a backup of a Catalina system volume, so in the near future, we're going to drop support for backing up macOS (Catalina and later) to HFS+ formatted volumes.
https://bombich.com/blog/2019/06/06...em-volume-and-hfs-getting-out-system-business
 
On my late 2015 27" iMac using an external thunderbolt SSD, thus far this beta has not become periodically non-responsive like the first two. My mac would become unusable at times.
 



Apple today seeded the third beta of macOS 10.15 Catalina for testing purposes, two weeks after seeding the second macOS Catalina beta and a month after the new Mac operating system update was first unveiled at the Worldwide Developers Conference.

The new macOS Catalina beta can be downloaded using the Software Update mechanism in System Preferences. As with all new betas, macOS Catalina should not be installed on a primary machine as it is early release software and could have major bugs.

test-macOS-10.15-800x522.jpg

macOS Catalina removes the iTunes app, splitting it into Music, Podcasts, and TV apps. The Apple Music and Apple Podcasts apps are available now, while the Apple TV app is coming later this year.

The new apps are similar in function to iTunes, but are split up by feature. iOS device management is still available on the Mac, but it's now done through Finder rather than iTunes.

With a new Sidecar feature, you can turn your iPad into a second display for your Mac with just the click of a button. The Apple Pencil works with Sidecar, so you can turn your iPad into a drawing tablet in apps like Photoshop and Illustrator.

Your Apple Watch can be used to approve security prompts in macOS Catalina, and Macs with a T2 chip support Activation Lock. There's a new Find My that brings the Find My Mac app to the Mac for the first time and even lets you track your devices when they're offline.

Screen Time is now available on the Mac as well as iOS devices, and Project Catalyst, a new Apple initiative, will let developers easily port their iPad apps over to the Mac.

There's a new Photos interface that surfaces your best photos organized by day, month, or year, there's a new start page in Safari, Mail has new tools for muting email threads and blocking senders, and the Reminders app has been overhauled.

32-bit apps no longer work in macOS Catalina, which is something to be aware of before installing the beta. For more details on macOS Catalina, make sure to check out our macOS Catalina roundup.

Article Link: Apple Seeds Third Beta of macOS Catalina to Developers
[doublepost=1562118393][/doublepost]A complete garbage build. Catalina has somehow managed to delete my Mail inbox. The entire inbox... all messages lost.

First time I have ever been this badly burned by a beta. Lesson learned. Thankfully Time Machine saved the day by doing a complete restore back to Mojave. I will wait until the GA release.
 
I ended up reinstalling the dev beta profile, downloaded the update again, rebooted into safe mode and then started the update again. After about 45 minutes, beta 3 installed. Thanks for all the comments and suggestions.
 
Catalina broke my iCloud connections on a MBA 2018 and a MBP i9 2018.

iPads and iPhone connect to Apple Music and photos library in the cloud but the macs can’t access. Apple Music doesn’t show any of the three first buttons contents. (Got you, discover , radio)

Now after dev preview 3 the photos app lost the ability to load the iCloud Photo Library.
Very annoying. Anyone else experiencing this or know any way to restore or reload entire Apple ID ?

My Apple ID for iCloud is a different one for the App Store and music store btw

Thanks
 
One solution would be to setup a macOS Mojave install inside of Parallels Desktop or VMWare Fusion for 32-bit apps. Name it Rosetta ;).
Depending on how much Apple want to remove 32-bit support, even virtualisation could be a huge problem. I suspect there is a chance Apple wants a clean cut to 32-bit and provide zero support from now on, both on system level and on hardware level.
 
Going nowhere near this version of Mac OS anytime soon. It's a sad, unfamiliar feeling. Mojave is my Mac OS stopping point for the foreseeable future.

I really hope the new Mac Pro ships with Mojave.
 
Speak for yourself, Catalina has been the most stable macOS Beta that I can remember. Mojave was a complete mess on the other hand...

If I was the only one, lots of people agree with me, Mojave was stable from beta 1, Catalina, just read this very thread here, it is a cluster ....., as I said, I used Macs for 2 decades now, never was it as unstable as now, you're lucky I guess.
I am a power user, I know the system, I almost always fix major problems by myself, this time though it's a buggy mess.
Apple themselves warned people when beta 1 was released, they never used such strong language before, so even Apple agreed, so yes, you're lucky.
 
If I was the only one, lots of people agree with me, Mojave was stable from beta 1, Catalina, just read this very thread here, it is a cluster ....., as I said, I used Macs for 2 decades now, never was it as unstable as now, you're lucky I guess.
I am a power user, I know the system, I almost always fix major problems by myself, this time though it's a buggy mess.
Apple themselves warned people when beta 1 was released, they never used such strong language before, so even Apple agreed, so yes, you're lucky.

For me stability was about same as Mojave in terms of bugs. But overall the OS was stable especially from seed 2. Not that there were not bugs, my area of struggle (seemingly fixed for me in seed 3 (public 2) ) was the implementation of splitting of iTunes to various stores and problems in implementation of one ID for everything as I have two IDs (old single username one that all my media, apps, music still purchased on, and my iCloud ID not used for any purchases just iCloud required ID needs). It took several tries without any instructions how this major change should be used, wish there were some, but after couple tries got it to work for me (yes many still have problems I get that). In this third seed though those changes have stuck for me and Music is working correctly.

Yep you are right this is a beta and Apple warned us about this specifically in way I had never seen before.
 
[doublepost=1562118393][/doublepost]A complete garbage build. Catalina has somehow managed to delete my Mail inbox. The entire inbox... all messages lost.

First time I have ever been this badly burned by a beta. Lesson learned. Thankfully Time Machine saved the day by doing a complete restore back to Mojave. I will wait until the GA release.
My Music library has been deleted with this build.
 
My Music library has been deleted with this build.

Wow I know as per any beta a number have had bad results, and a number like me have not. Thats awful. As mentioned the person you replied to has TM back up. I also do so I can always go back, learned that lesson back a few years ago in the beta testing process.
 
For me stability was about same as Mojave in terms of bugs. But overall the OS was stable especially from seed 2. Not that there were not bugs, my area of struggle (seemingly fixed for me in seed 3 (public 2) ) was the implementation of splitting of iTunes to various stores and problems in implementation of one ID for everything as I have two IDs (old single username one that all my media, apps, music still purchased on, and my iCloud ID not used for any purchases just iCloud required ID needs). It took several tries without any instructions how this major change should be used, wish there were some, but after couple tries got it to work for me (yes many still have problems I get that). In this third seed though those changes have stuck for me and Music is working correctly.

Yep you are right this is a beta and Apple warned us about this specifically in way I had never seen before.

Troubles with slow Finder, Time Machine is very..VERY slow, hours for a few 100 MB, makes a backup for today, the day after tomorrow it's gone, so no July 1st backup.
Difficult to Update from beta 1 to 2, My disk space got less and less, Terminal said I had just 1 Local back up, DiskUtility reported 12, a MR user advised me to switch off automatic backup, I did and got 15 GB back and able to Update.
Beta 2 to 3, can't Update because Software Update in Preferences as well in Terminal tell me I need 17.5 GB, Finder reports 22 GB.
I deleted a lot of Apps and .lproj folders, at just over 17.5 GB SUpdate complained, even after deleting more it still complains.
I have Automatic Backup switched off, only a sleep image and 1 VM file, back to about 6 GB out of 22 I had yesterday when I went to bed.
When I restart space will be in the low GB's, it climbs up and up to about 22 GB, still refuses to Update.
I heard that several places are mounted instead of a Folder, like the System folder, VM is also a mounted disk, I saw my SSD and SSD data (TimeMachine related I think), iCloud also had an iCloud folder and iCloud Data with odd named folders in it.
Seems to me a lot has been changed regarding the system since Mojave.
 
Troubles with slow Finder, Time Machine is very..VERY slow, hours for a few 100 MB, makes a backup for today, the day after tomorrow it's gone, so no July 1st backup.
Difficult to Update from beta 1 to 2, My disk space got less and less, Terminal said I had just 1 Local back up, DiskUtility reported 12, a MR user advised me to switch off automatic backup, I did and got 15 GB back and able to Update.
Beta 2 to 3, can't Update because Software Update in Preferences as well in Terminal tell me I need 17.5 GB, Finder reports 22 GB.
I deleted a lot of Apps and .lproj folders, at just over 17.5 GB SUpdate complained, even after deleting more it still complains.
I have Automatic Backup switched off, only a sleep image and 1 VM file, back to about 6 GB out of 22 I had yesterday when I went to bed.
When I restart space will be in the low GB's, it climbs up and up to about 22 GB, still refuses to Update.
I heard that several places are mounted instead of a Folder, like the System folder, VM is also a mounted disk, I saw my SSD and SSD data (TimeMachine related I think), iCloud also had an iCloud folder and iCloud Data with odd named folders in it.
Seems to me a lot has been changed regarding the system since Mojave.


Wow thats a big hassle. Have not experienced that. But I have a good time machine back up of previous OS (Mojave) and so I just installed the seed (s) on boot drive and if I have problems (yep it takes time) I just wipe and restore from TM (that only failed once on me in all the years). So not seeing this here. Yep they put the download of the update in weird place and in all these separate packages that gave us the headaches yesterday with the bridgeOS thing what ever that was. Probably wreaks havoc with however you and others do things. It finally installed after 5 PM yesterday when Apple (apparently) got the package working. At least it did for me with not any further hassle.

Oh not noticing slow finder, or TM (working normally for me in all beta versions so far). Music, the store splits and how it worked with the the ID implemention and lack of info on how to use it was my biggest problem in first two betas
 
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