64-bit Photoshop to be Windows only, at first

64-bit Photoshop to be Windows only, at first

Summary: Photoshop Senior Project Manager John Nack posted a piece on his blog called Photoshop, Lightroom, and Adobe's 64-bit roadmap where he divulges that Photoshop (CS4) will be available in 64-bit versions for Windows, but only a 32-bit version for OS X.It doesn't mean that the Windows version of Photoshop will be twice as fast as the Mac OS X version though.

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64-bit Photoshop to be Windows onlyPhotoshop Senior Project Manager John Nack posted a piece on his blog called Photoshop, Lightroom, and Adobe's 64-bit roadmap where he divulges that Photoshop (CS4) will be available in 64-bit versions for Windows, but only a 32-bit version for OS X.

It doesn't mean that the Windows version of Photoshop will be twice as fast as the Mac OS X version though. According to Nack, "the speedup due to running in 64-bit mode is around 8-12%."

However, people working with the largest images will benefit from 64-bit processing:

For example, opening a 3.75 gigapixel image on a 4-core machine with 32GB RAM is about 10x faster.

The reason the Windows gets the x64 nod before OS X is because Photoshop is a Carbon application (like Final Cut Pro and iTunes) and Apple decided to drop their 64-bit Carbon efforts at WWDC in June 2007.

This means that we'll need to rewrite large parts of Photoshop and its plug-ins (potentially affecting over a million lines of code) to move it from Carbon to Cocoa.

Nack states that although the Mac x64 revision will take longer to deliver, "our goal is to ship a 64-bit Mac version with Photoshop CS5," which he quickly hedges by saying  "but we’ll be better able to assess that goal as we get farther along in the development process."

For more I recommend reading Jon Gruber's detailed analysis on the Photoshop64 situation on Daring Fireball.

Topics: Windows, Hardware, Networking, Operating Systems, Processors, Software

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11 comments
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  • 2 other factors at play

    OS X is not a 64 bit OS, it is a 32 bit OS with a 64 bit compatibility layer thrown over it. When the article states: [i]the speedup due to running in 64-bit mode is around 8-12%.[/i]

    they are talking about the difference between 32 bit and 64 bit photoshop on Windows because there would be 0 difference in OS X considering all 64 bit code eventually has to go through the 32 bit core. Wake us up when OS X is truly 64 bit otherwise saying an OS X app is 64 bit is nothing more than marketing speak.

    The other problem is that Apple has been [url=http://hardware.slashdot.org/article.pl?sid=08/04/01/1710221] lying about their monitors [/url] and so running graphics programs on a Mac is only for rank amateurs who don't care about colour quality.
    NonZealot
    • oh.. right...

      thats good information. Now how much is true?

      I like people who make wild claims without showing any proof.

      I've seen you make similar statements before, yet still not showing where you get your information... its almost like you believe certain things to be true just because it hasn't been disproven.

      Its funny people can say multiple things, only show evidence for one, and think all their statements are just completely accepted.
      doh123
      • If only.....

        If only Zealot showed the slightest ounce of proof of anything
        he says, then he might have a micro-ounce of credibility!
        themusicmanrk
        • I always show proof when asked, read it and weep

          [url=http://arstechnica.com/reviews/os/mac-os-x-10-5.ars/6] Leopard is a 32 bit OS [/url]

          [i]Apple has gone 64-bit across the board, with two major exceptions. The first is [b]the kernel itself, which remains 32-bit[/b] in order to maintain compatibility with existing drivers. The second is a bit of a sad story...
          Though several non-GUI parts of the Carbon API that are shared with Cocoa will be supported in 64-bit mode in Leopard, the GUI portions of the Carbon API will not.[/i]

          So you see, the very core of Leopard, the kernel, [b]is 32 bit[/b]. That is an indisputable fact. End of story. There is your proof. Are you going to admit now that I was right?
          NonZealot
  • RE: 64-bit Photoshop to be Windows only, at first

    your hatred of macs puts me to shame.
    ZenMasta
    • RE: 64-bit Photoshop to be Windows only, at first

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  • And this is NEW ?

    The same goes for Autodesk and many other companies that simply and easily make things for Windows 64 but there is only 32 bit left for poor Mac.

    Is it a conspiracy? No! Few developers of software like Apple and many don't like them always trying to gold dig into their profits. Apple simply does not have a good ROI for the developer and, quite frankly, not for the end user either.
    JABBER_WOLF
  • wait a moment...

    we had to wait FOREVER for adobe to make an intel version of CS, because they claim they had to re-write almost all of it because of legacy code...

    they spent over a year re-writing it.... and used Carbon? someone needs to get fired over that decision. Lets spend all this time and money to re-write this app, and use the old outdated crap that we know will force us to do it all over again!
    doh123
    • ok...

      looks like it was just laziness on their part to stick more with Carbon, since Apple said they would make Carbon 64 bit, but then last year said no.... it will stay 32bit and only cocoa will be 64.

      Still they shouldn't have wasted all that time to just use carbon, even if Apple said early on they would make it 64 bit. From everything I ever heard, Carbon was slowly going ot be phased out for Cocoa.
      doh123
  • RE: 64-bit Photoshop to be Windows only, at first

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