All-new Interface. MacOS Big Sur brings a new design that's been finely tuned for the powerful features that make a Mac a Mac. Core features, such as the menu bar and Dock, take advantage of the large Mac display, with translucent backings and spacious pull-down menus. The filename will still be Install macOS High Sierra Beta, but it really is the GM Candidate. For regular Mac users, running the installer one time should be sufficient to get you upgraded to.
Hello -
I've successfully installed the High Sierra GM candidate on my MacBook Pro.
I've spent the past few hours trying to get it to install onto my Mac Mini (Late 2014). Currently running Sierra.
When I run the installer, it reboots, starts to install, then says 'Unable to unmount volume for repair'.
If I boot into Recovery, then run disk utility, I get a similar error. If I bring up a terminal, then 'diskutil unmount' the drive, it says 'Volume Macintosh HD on diskX failed to unmount: dissented by PID=0 (kernel)'. This is from the Recovery partition, so I'm not actively booted from 'Macintosh HD'.
I ran 'diskutil unmount force' on the partition, then I was able to run Disk Utility's 'First Aid'. Everything seemed OK. I still couldn't install High Sierra (same error).
I then created a High Sierra installer on an SD card, and booted from it (held Option while booting). Again, when installing macOS, I get the 'Unable to unmount the volume for repair' error.
If (while booted from the SD card) I bring up a terminal and 'diskutil unmount force', the installer doesn't show 'Macintosh HD' as an option (expected).
If I run 'diskutil mount readOnly ...', then run the installer, it sees the disk - but fails (because it's readonly). When it's mounted readonly, 'diskutil unmount' (without force) works fine.
If I run 'diskutil mount ...', then immediately try 'diskutil unmount' (without 'force'), it fails with the same 'dissented by PID=0 (kernel)' error.
Why is the kernel mounting 'Macintosh HD' (even when I'm booted from external media) and keeping it 'locked'? Is there any way to fix this?
I've also tried 'csrutil disable' to disable the System Integrety protection stuff. No difference.
Any ideas/suggestions?
Thanks!
- Paul B.
macOS Big Sur takes the most advanced operating system in the world to a whole new level of power and beauty, and makes your apps look better than ever. Widgets and the widget gallery help you deliver more value to your users. Adding intelligence to your apps with machine learning is simple with extensive tools, models, training capabilities, and APIs. You can create more powerful Mac versions of your iPad apps with Mac Catalyst. And you can easily bring your extensions to Safari — and to the App Store.
All-new Interface
macOS Big Sur brings a new design that's been finely tuned for the powerful features that make a Mac a Mac. Core features, such as the menu bar and Dock, take advantage of the large Mac display, with translucent backings and spacious pull-down menus. The new Control Center, designed just for Mac, provides quick access to controls while keeping the menu bar clutter-free. Notification Center puts recent notifications and powerful new widgets together in a single view for at-a-glance information as you work. And a streamlined new design for apps features full-height sidebars and integrated toolbar buttons.
Widgets
Macos High Sierra Apple
Easily build widgets using the WidgetKit framework and the new widget API for SwiftUI. Widgets now come in multiple sizes, and users can visit the new widget gallery to search, preview sizes, and add them to Notification Center to access important details at a glance.
Safari Extensions
With support for the popular WebExtension API, it's even easier to bring powerful extensions to Safari. Xcode 12 even includes a porting tool to streamline the process.
The new Extensions category on the Mac App Store showcases Safari extensions, with editorial spotlights and top charts to help users discover and download great extensions from the developer community.
Machine Learning
With macOS Big Sur, creating apps that leverage the power of machine learning is even easier and more extensive with additional tools in Core ML for model deployment, new models and training capabilities in Create ML, more APIs for vision and natural language, and improved resources for training on Mac and converting models to Core ML format.
Mac Catalyst
Create even more powerful Mac versions of your iPad apps. Apps built with Mac Catalyst now take on the new look of macOS Big Sur and help you better define the look and behavior of your apps. You can choose to turn off automatic scaling of iPad controls and layout, allowing you to precisely place every pixel on the screen. Provide full control of your app using just the keyboard, take advantage of the updated Photos picker, access more iOS frameworks, and more.
Macos Sierra
User privacy on the App Store.
The Mac App Store helps users better understand apps' privacy practices. You'll need to enter your privacy practice details into App Store Connect for display on your product page.
Macos El Capitan
I've also tried 'csrutil disable' to disable the System Integrety protection stuff. No difference.
Any ideas/suggestions?
Thanks!
- Paul B.
macOS Big Sur takes the most advanced operating system in the world to a whole new level of power and beauty, and makes your apps look better than ever. Widgets and the widget gallery help you deliver more value to your users. Adding intelligence to your apps with machine learning is simple with extensive tools, models, training capabilities, and APIs. You can create more powerful Mac versions of your iPad apps with Mac Catalyst. And you can easily bring your extensions to Safari — and to the App Store.
All-new Interface
macOS Big Sur brings a new design that's been finely tuned for the powerful features that make a Mac a Mac. Core features, such as the menu bar and Dock, take advantage of the large Mac display, with translucent backings and spacious pull-down menus. The new Control Center, designed just for Mac, provides quick access to controls while keeping the menu bar clutter-free. Notification Center puts recent notifications and powerful new widgets together in a single view for at-a-glance information as you work. And a streamlined new design for apps features full-height sidebars and integrated toolbar buttons.
Widgets
Macos High Sierra Apple
Easily build widgets using the WidgetKit framework and the new widget API for SwiftUI. Widgets now come in multiple sizes, and users can visit the new widget gallery to search, preview sizes, and add them to Notification Center to access important details at a glance.
Safari Extensions
With support for the popular WebExtension API, it's even easier to bring powerful extensions to Safari. Xcode 12 even includes a porting tool to streamline the process.
The new Extensions category on the Mac App Store showcases Safari extensions, with editorial spotlights and top charts to help users discover and download great extensions from the developer community.
Machine Learning
With macOS Big Sur, creating apps that leverage the power of machine learning is even easier and more extensive with additional tools in Core ML for model deployment, new models and training capabilities in Create ML, more APIs for vision and natural language, and improved resources for training on Mac and converting models to Core ML format.
Mac Catalyst
Create even more powerful Mac versions of your iPad apps. Apps built with Mac Catalyst now take on the new look of macOS Big Sur and help you better define the look and behavior of your apps. You can choose to turn off automatic scaling of iPad controls and layout, allowing you to precisely place every pixel on the screen. Provide full control of your app using just the keyboard, take advantage of the updated Photos picker, access more iOS frameworks, and more.
Macos Sierra
User privacy on the App Store.
The Mac App Store helps users better understand apps' privacy practices. You'll need to enter your privacy practice details into App Store Connect for display on your product page.
Macos El Capitan
Macos Sierra 10.12 Download
Tools and resources
Use Xcode 12 and these resources to build apps for macOS Big Sur.
