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Apple prepares macOS for discontinuation of 32-bit app support
By Thom Holwerda, submitted by Drumhellar on 2018-02-03 14:15:01

When users attempt to launch a 32-bit app in 10.13.4, it will still launch, but it will do so with a warning message notifying the user that the app will eventually not be compatible with the operating system unless it is updated. This follows the same approach that Apple took with iOS, which completed its sunset of 32-bit app support with iOS 11 last fall.

This is good. I would prefer other companies, too, take a more aggressive approach towards deprecating outdated technology in consumer technology.

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RE: Needs to be done...
By codewrangler on 2018-02-03 19:13:20
BTW, I run a Virtual Windows 7 install, just so I can run the old Sony MiniDisc software with my MiniDisc devices, that support it.
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RE[2]: Needs to be done...
By BlueofRainbow on 2018-02-03 20:19:24
Hum.....

I believe that Windows 7 reaches its end-of-support-life next year.

Would you continue to run this Virtual Windows 7 set-up to maintain your MiniDisc collection?
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RE: Not a good thing
By Drumhellar on 2018-02-03 20:23:02
If you want eternal compatibility (Well, near eternal), stick with Windows.

Based on Apple's history, this is actually on schedule for a platform transition, even if partial.

The first mac came out in '84. The first PowerPC Mac came out in '95. The first Intel mac came out in '06. Now it's 2018 - just about time to excise the previous architecture. It's not like the writing hasn't been on the wall for years.

Users gain, also. Less work spent maintaining old API and kernel interfaces means more work can be spent on maintaining and improving 64-bit interfaces.

Also Several threat mitigation techniques are improved with 64-bits, meaning better security for users.
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Is 32-bit architecture that out-dated?
By BlueofRainbow on 2018-02-03 20:31:09
The only positive aspect of the story is that users will be warned ahead of 32-bit support completely disappearing and that the application just lunched will not run on the next macOS upgrades.

Depending on the set of applications the user has, there will be a choice between:
- freezing macOS to the current version to retain 32-bit support
or
- shelling out much money to upgrade the most valuable applications, if the vendors are still in business and continuing to maintain these applications.

Another down-fall - what about all those games one may have collected over the years?
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RE: Comment by Kroc
By galvanash on 2018-02-03 21:15:34
> A chip that has no 32-bit hardware at all is going to require a significantly less number of transistors and therefore less heat / more room to do something else.

It can simplify some things from the perspective of the programming model, and this may allow some small but advantageous hardware changes. However, as a piratical matter, most architectures that support mixed 32-bit/64-bit ISAs do so by simply using the 64-bit hardware - there is no "32-bit hardware"...

In other words there is no significant hardware cost to to supporting 32-bit code using 64-bit hardware and whatnot - you just ignore half the contents of the registers. The only cost real cost comes in decode and some bookkeeping, but generally that cost is mostly significant.
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RE: 32bits, x86.
By bugjacobs on 2018-02-03 23:11:13
SatyaN. himself .. :-)
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RE[3]: Needs to be done...
By bugjacobs on 2018-02-03 23:12:46
Wine on Linux :-)
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RE: Is 32-bit architecture that out-dated?
By bugjacobs on 2018-02-03 23:13:50
Backwards compatibility has never been a Apple force ... (?) Just look at Adobe software ..
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RE: Comment by ebasconp
By zima on 2018-02-03 23:47:47
> 64-bit apps can access more RAM and have more CPU registers available, BUT, the memory footprint of most applications is larger too because of pointers size being used intensively.

[...]

Java 7+ has a nice workaround to have shorter pointers in 64-bit tech:

https://wiki.openjdk.java.net/dis...
Hm, and IIRC there was some ~Linux effort to have system/apps which can use additional "64-bit" CPU registers but without the memory overhead of "full" 64-bit apps...
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RE[2]: Is 32-bit architecture that out-dated?
By sklofur on 2018-02-04 00:18:36
Remembering that the original Mac came out in 1984, a G5 Mac shipping in 2006 could run almost all Mac software released up to that date. The Classic MacOS was a flawed product (necessarily of its time) and most of its internal technologies weren’t changed much after System 7 (with a couple of exceptions), so the Classic environment could run almost everything that shipped.

Even after the Intel transition, a Mac running Snow Leopard could still run almost every OS X title released to that point. Apple’s penchant for breaking compatibility came with the release of Tiger. Sure, Classic didn’t make it to Intel, but I suspect that was more due to technical issues.

In and of itself, I don’t mind this so long as there remains a viable way to run the older software without needing old hardware.

Edited 2018-02-04 00:20 UTC
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