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Better battery life… this of course is never going to happen. And it’s not comforting, Apple needs to get rid of Liquid Glass, which of course is also not going to happen.
It can and does - note the difference between MacOS (26.2) Vs (26.3) where parts of the windowing software were updated.
Replacing Legacy software calls, that were activated due to ‘Liquid Glass’.
 
Sounds good to me.
I wonder if iOS 27 will drop support for devices?
If its a "cleanup" that improves things then it sounds like it would support the same devices that works on iOS 26, same goes for iPads.
I guess it might drop support for Intel Macs much like snow leopard dropped support for powerPC macs . This way they could optimise the code for Apple silicon 🤷‍♂️
 
Yeah people were especially enthusiastic about this feature:

One minor very insignificant bug 👀. Also they removed AppleTalk which completely screwed up our studio for about 3 days. We had to first figure out what was happening then apply static IP addresses to everything to fix it. Other than that Snow Leopard was great haha.

Seriously though, despite the above it was genuinely the best system upgrade ever. Things were noticeable faster and less buggy in the grand scheme of things.
 
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iPadOS 26 definitely is dissipating more battery life than iPadOS 18. The brand new A16 is not lasting as long as the three year old and heavily used ninth generation. (A13). This last 26.3 update seems to have made it even worse.

A full shutdown and restart only improved things slightly. Bluetooth is already off.
 
So iOS 26 was beta… just say that. We released it too soon. I’ve never turned off so many “new features” on my device and wished I had the previous os. Maybe it’s my iPhone but a year old device iPhone 16 Pro has never aged so drastically. My iPhone 13 Pro held out for a long time. I honestly wish I hadn’t replaced it.
 
Know what helps battery life a ton?

Not ray tracing every damn UI element like liquid glass requires. Get rid of it and watch battery life go up instantly. Plus you get the added benefit of actually being able to read what's on your screen,.
 
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Apple's iOS 27 update will prioritize cleaning up the operating system's internals, with engineers making changes that could result in better battery life, according to Bloomberg's Mark Gurman.

iOS-27-Mock-Quick.jpg

The effort is said to be similar to what Apple did with its Snow Leopard Mac update years ago, and will involve removing old code, rewriting existing features, and subtly upgrading apps to improve their performance.

The result should hopefully be a "snappier, more responsive" OS, says Gurman. Apple is also reportedly planning some interface tweaks, but nothing as dramatic as the Liquid Glass overhaul introduced with iOS 26, which will likely comfort some users.

Code-named "Rave" internally, iOS 27 will also include efficiency improvements that Apple hopes will translate into tangible battery gains for users, says Gurman. However, it's unclear whether Apple would market those improvements or simply let users discover them on their own.

Gurman says getting the software into good shape is especially important as Apple prepares to launch new device categories, including a touchscreen MacBook Pro and its first foldable iPhone, both of which are expected in the second half of 2026.

The cleanup effort comes alongside Apple's other major iOS 27 priority of improving its AI capabilities. The revamped, chatbot-style Siri that Apple announced in June 2024 has been repeatedly delayed, and some of its features are now expected to arrive in iOS 27 rather than iOS 26, reports Gurman.



Article Link: iOS 27 'Rave' Update to Clean Up Code, Could Boost Battery Life
Does this mean that I'll be able to hold my finger on text and consistently get a Copy/paste menu?
 
The key thing that many folks miss with their revisionist glorification about Snow Leopard is that it was NOT the greatest update ever… when it first shipped in August of 2009. MacOS was in SUCH a bad state following Leopard that it took nearly 18 months to get Snow Leopard to the point that people remember. As another commenter mentioned, the bug that deleted users' data was once such pain point. Snow Leopard 10.6.5 shipped in November of 2010, and that was the first 'usable' (but not great) release of Snow Leopard. It took another nearly 6 months to get it to the state that is so fondly remembered. The 'glory days' of Snow Leopard actually came in the **2 YEARS** or so FOLLOWING 10.6.7 shipping (March 2011)! While Lion 10.7 (July 2011) turned out to be a regressive pain point, necessitating Mountain Lion 10.8 (July 2012), which itself didn't find footing until 10.8.3, which was released in March of 2013. And even then, a lot of users sat out Mountain Lion and didn't move on from Snow Leopard until OS X Mavericks 10.9.3 in May of 2014.

So Apple really needs to take a hard look at its current year-over-year dev cycle (which started, perhaps not coincidentally, with Lion!) to see how we've gotten to where we are: nearly 15 years of piling up technical debt…
 
Rewriting typically involves deprecating old libraries and replacing them with a more optimized code, which results in performance gains. No one rewrites code that ends up adding extra overhead compared to the existing one.

New features on the other hand means more complex code which definitely adds overhead and potential for new bugs no matter how well-written it is.
Not true. You can absolutely introduce new bugs that cause existing functionality to no longer work when rewriting code. Rewriting is not just replacing older libraries with newer ones.
 
One minor very insignificant bug 👀. Also they removed AppleTalk which completely screwed up our studio for about 3 days. We had to first figure out what was happening then apply static IP addresses to everything to fix it. Other than that Snow Leopard was great haha.

Seriously though, despite the above it was genuinely the best system upgrade ever. Things were noticeable faster and less buggy in the grand scheme of things.
release notes for the 10.6.1 update:

  • compatibility with some Sierra Wireless 3G modems
  • an issue that might cause DVD playback to stop unexpectedly
  • some printer compatibility drivers not appearing properly in the add printer browser
  • an issue that might make it difficult to remove an item from the Dock
  • instances where automatic account setup in Mail might not work
  • an issue where pressing cmd-opt-t in Mail brings up the special characters menu instead of moving a message
  • Motion 4 becoming unresponsive
10.6.2 update

  • an issue that might cause your system to logout unexpectedly
  • a graphics distortion in Safari Top Sites
  • Spotlight search results not showing Exchange contacts
  • a problem that prevented authenticating as an administrative user
  • issues when using NTFS and WebDAV file servers
  • the reliability of menu extras
  • an issue with the 4-finger swipe gesture
  • an issue that causes Mail to quit unexpectedly when setting up an Exchange server
  • Address Book becoming unresponsive when editing
  • a problem adding images to contacts in Address Book
  • an issue that prevented opening files downloaded from the Internet
  • Safari plug-in reliability
  • general reliability improvements for iWork, iLife, Aperture, Final Cut Studio, MobileMe, and iDisk
  • an issue that caused data to be deleted when using a guest account

10.6.3:
  • improve the reliability and compatibility of QuickTime X
  • address compatibility issues with OpenGL-based applications
  • address an issue that causes background message colors to display incorrectly in Mail
  • resolve an issue that prevented files with the # or & characters in their names from opening in Rosetta applications
  • resolve an issue that prevented files from copying to Windows file servers
  • improve performance of Logic Pro 9 and Main Stage 2 when running in 64-bit mode
  • improve sleep and wake reliability when using Bonjour wake on demand
  • address a color issue in iMovie with HD content
  • improve printing reliability
  • resolve issues with recurring events in iCal when connected to an Exchange server
  • improve the reliability of 3rd party USB input devices
  • fix glowing, stuck, or dark pixels when viewing video from the iMac (Late 2009) built-in iSight camera
10.6.4:

  • resolve an issue that causes the keyboard or trackpad to become unresponsive
  • resolve an issue that may prevent some Adobe Creative Suite 3 applications from opening
  • address issues copying, renaming, or deleting files on SMB file servers
  • improve reliability of VPN connections
  • resolve a playback issue in DVD Player when using Good Quality deinterlacing
  • resolve an issue editing photos with iPhoto or Aperture in full screen view
  • improve compatibility with some braille displays
I can also dig up old MR threads. The same comments today about the state of Apple and Tim Cook were also there for Steve Jobs
 
Rewriting typically involves deprecating old libraries and replacing them with a more optimized code, which results in performance gains. No one rewrites code that ends up adding extra overhead compared to the existing one.

New features on the other hand means more complex code which definitely adds overhead and potential for new bugs no matter how well-written it is.
The problem is, these aren't the days that Snow Leopard developers are still at Apple.
And the problem with all of these bugs are all of the younger developers in there just destroying things piece by piece.

Sorry, but incompetence is incompetence. A generational loss has happened and we aren't going back to the days of human refactoring very much. So a Snow Leopard like fix will probably just introduce many new bugs that piggyback on the old ones.

While I was hoping for a release like this, I don't feel the developers are up for the challenge anymore so I'm not really holding my breath.
 
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Not true. You can absolutely introduce new bugs that cause existing functionality to no longer work when rewriting code. Rewriting is not just replacing older libraries with newer ones.
I never said it's going to be bug-free. I said it's going to be an improvement.
And I said rewriting "typically involves" which means part of the process and not the entirety of it.

You're trying to read between the lines that are not there.
 
I'm skeptical because we've heard rumors like this before about engineers wanting to do a Snow Leopard-style maintenance update; e.g., iOS 9.

Snow Leopard has been mythologized into something more stable and significant than it actually was when it came out. It had its fair share of serious bugs and stability issues. Look at how Snow Leopard was reported at the time.
 
About - damned - time.

On iOS26: my iPhone 17 Pro Max is almost as laggy, e.g. stuttering of PS visual effects, as my non-Pro iPhone 13.

On iPadOS26: ditto for my M5 iPP vs. my M1 iPad Air.

And on both new devices there are visual bugs for some apps, e.g. the Google apps's search bar appearing at the top of the screen with time, battery etc. Also there've been too many times a reboot was needed, like when triggering Siri who then hears nothing.
 
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