Previous 1 6 7 8 9 10 Next 141 Replies Latest reply: Nov 10, 2009 9:15 AM by jjporter1979 Go to original post
  • ALLT4 Level 1 (10 points)
    "I can only assume that many of these other problems people are reporting are also self-inflicted. Look at what you are running in the menu bar and in the background before you report that the world is ending to apple"

    You would assume wrong. I don't have it either and experienced the problem. Let me further add that I don't know how many times it's been said on these forums or others that the airport wireless seems to be the issue with software in SL. My native Windows 7 install experiences none of the issues using wireless, either does Snow Leopard using hardwired ethernet with airport card tuned off. As soon as I re-enable my airport, unplug from hardwired ethernet the problem returns. Strangely using the hardwired ethernet even with airport still active the problems never appears. Something is not releasing system resources from airport when active and in heavy use.

    There's a heck of a lot more 27" imac systems out there without complaints than we're seeing here with complaints. I can only assume those without problems are using hardwired ethernet.

    Using my new 27" imac with hardwired ethernet is a joy. I'm like a kid in a candy store marveling at the speeds I never knew in a mac.
  • SteveDion Level 1 (0 points)
    I reinstalled with commercial Snow Leopard install DVD i had and it fixed it. Have been using it for 5 days not without any problems. It was very problematic before (even had many issues with Parallels 4. But now purrs like a cat!
  • menajemh Level 1 (0 points)
    I found that someone posted a solution but i didn't see it here. the problem could be a corrupted flash player plugin that comes installed by default in most apple computers from factory. i had the same issue with my other imacs and macbook air. one solution would be to reinstall the os from the cds that apple provided, apple does not install ur os from the cds, they just clone the hd from another one.
    the solution that worked for me:
    - uninstall the flash player, got to and find there the uninstall tool
    - reinstall the adobe flash player, u have to download it from their website 2.
    - fix disk permissions using disk utility, found in applications
    - shut down the imac
    - unplug it from electric cord
    - press power button for 20 secs. aprox. (make sure the imac is unplugged from electricity).
    - plug it back again to the power cord
    - reset PRAM
    - now everything should work properly

    please share your experience after few hours of use.
    it's being 2 days since i did this and the imac works like it should.
  • dhogborg Level 1 (0 points)
    I've found a workaround that keeps my machine zippy. I disabled the AirPort and plugged in a hard wire ethernet to the router. 8 hours of semi-intensive photoshop work later and still getting 173 xbench score (see earlier post for details on that, score on slow machine was ~20). So now I'm waiting for someone to fix the Airport drivers i guess?

    Anyone else had success implementing this workaround?
  • TFK Level 1 (0 points)
    HUGE problems when playing Flash videos on my brand-freaking new iMac. I can't make it through an episode of anything on Hulu or any other flash-based site without it completely bogging down on me. In Activity Monitor Flash was using over 120%!!! That's ridiculous!!! Fix this now, please Apple! Lots of people payed lots of money for the best computer and if you can't even play Flash then what's the point?
  • Gambit75 Level 1 (0 points)
    Not just the iMac 27" has this issue. I bought the new iMac 21.5" and I get the same problem and I don't think Flash is causing it but just a symptom of another issue.

    If I use the iMac for more than 30min everything slows down, browsing the web, resizing Finder windows, screensaver and video playback is choppy.

    As someone else suggested on the forum is to turn on/off Airport from the menu bar and everything comes back to normal and that works everytime.

    Don't think its Flash since I don't even have Safari open at all and it will still slow down. May be the Airport drivers that need fixing. Whatever it is I hope it gets fixed soon, it's really annoying!!
  • Deniolan Level 1 (0 points)
    "here's a heck of a lot more 27" imac systems out there without complaints than we're seeing here with complaints. I can only assume those without problems are using hardwired ethernet"

    This would also be a bad assumption - I am wireless, not wired, and I no longer have the problem after removing iStat.

    My assumption isn't really that solely iStat causes the problem. My assumption is that many people who are experiencing the issue used the migration tool, or installed apps from their old Leopard machines on their new Snow Leopard iMac that might not be appropriate for Snow Leopard.

    For me, iStat removal solved the issue. For someone else - it might be some other "background app" that is not yet optimized for Snow Leopard.

  • grandejava Level 1 (0 points)
    I got my new 27" imac two weeks ago and had the same problem. Called Apple and here's what fixed it:

    Right click Safari to highlight
    Get Info
    Check "Open in 32-bit mode"
    Enjoy flash video.
  • keith baumwald Level 1 (0 points)
    It's definitely ISTAT! As soon as I removed and retried playing the same YouTube video it played smoothly with no choppiness or lag.
  • Mark Morissette Level 1 (0 points)
    I've been having terrible Flash video issues with my 1st gen aluminum 20" iMac since SL and discovered that uninstalling iStat solved the issue for me as well.
  • muumilaakso Level 1 (0 points)
    No, I haven't got iStat on my iMac 27", haven't done migration at all and still got flash conflict.
  • Lars512 Level 1 (0 points)
    How about those complaining of system slowdown post XBench stats. I benched this 27" iMac with default build in-store. I hope the numbers come out formatted ok.

    Comparing this to my late-2006 MacBook Pro, it was far worse in every major statistic except the disk benchmarks, where it did ok. The overall score was 18.91, compared to my laptop's score of 158.47! This suggests some systemtic issue that Apple needs to patch. The iMac hardware should be killing my much older machine. The other two 27" iMacs in store benched comparably.

    27" iMac

    Results 18.91
    System Info
    Xbench Version 1.3
    System Version 10.6.1 (10A2155)
    Physical RAM 4096 MB
    Model iMac10,1
    Drive Type ST31000528ASQ
    CPU Test 54.79
    GCD Loop 52.78 2.78 Mops/sec
    Floating Point Basic 128.28 3.05 Gflop/sec
    vecLib FFT 141.03 4.65 Gflop/sec
    Floating Point Library 25.53 4.45 Mops/sec
    Thread Test 79.13
    Computation 284.86 5.77 Mops/sec, 4 threads
    Lock Contention 45.95 1.98 Mlocks/sec, 4 threads
    Memory Test 15.80
    System 17.21
    Allocate 24.49 89.93 Kalloc/sec
    Fill 14.03 682.23 MB/sec
    Copy 16.08 332.15 MB/sec
    Stream 14.60
    Copy 15.00 309.84 MB/sec
    Scale 13.61 281.27 MB/sec
    Add 14.89 317.21 MB/sec
    Triad 14.97 320.31 MB/sec
    Quartz Graphics Test 16.25
    Line 9.81 652.93 lines/sec [50% alpha]
    Rectangle 14.84 4.43 Krects/sec [50% alpha]
    Circle 20.66 1.68 Kcircles/sec [50% alpha]
    Bezier 22.34 563.41 beziers/sec [50% alpha]
    Text 22.18 1.39 Kchars/sec
    OpenGL Graphics Test 23.15
    Spinning Squares 23.15 29.37 frames/sec
    User Interface Test 6.44
    Elements 6.44 29.56 refresh/sec
    Disk Test 62.84
    Sequential 113.05
    Uncached Write 105.25 64.62 MB/sec [4K blocks]
    Uncached Write 221.98 125.60 MB/sec [256K blocks]
    Uncached Read 57.19 16.74 MB/sec [4K blocks]
    Uncached Read 257.02 129.17 MB/sec [256K blocks]
    Random 43.51
    Uncached Write 13.45 1.42 MB/sec [4K blocks]
    Uncached Write 336.45 107.71 MB/sec [256K blocks]
    Uncached Read 111.05 0.79 MB/sec [4K blocks]
    Uncached Read 178.63 33.15 MB/sec [256K blocks]

    MacBook Pro (late 2006, SSD upgrade, 3GB ram)

    Results 158.47
    System Info
    Xbench Version 1.3
    System Version 10.6.1 (10B504)
    Physical RAM 3072 MB
    Model MacBookPro2,2
    Drive Type CORSAIR CMFSSD-128GBG2D
    CPU Test 164.10
    GCD Loop 273.48 14.42 Mops/sec
    Floating Point Basic 133.67 3.18 Gflop/sec
    vecLib FFT 106.46 3.51 Gflop/sec
    Floating Point Library 260.16 45.30 Mops/sec
    Thread Test 212.75
    Computation 193.66 3.92 Mops/sec, 4 threads
    Lock Contention 236.01 10.15 Mlocks/sec, 4 threads
    Memory Test 136.12
    System 148.87
    Allocate 185.22 680.19 Kalloc/sec
    Fill 133.09 6471.31 MB/sec
    Copy 138.13 2853.04 MB/sec
    Stream 125.39
    Copy 118.09 2439.04 MB/sec
    Scale 117.57 2429.06 MB/sec
    Add 134.12 2856.95 MB/sec
    Triad 133.84 2863.13 MB/sec
    Quartz Graphics Test 199.23
    Line 150.99 10.05 Klines/sec [50% alpha]
    Rectangle 199.83 59.66 Krects/sec [50% alpha]
    Circle 171.46 13.98 Kcircles/sec [50% alpha]
    Bezier 176.79 4.46 Kbeziers/sec [50% alpha]
    Text 504.88 31.58 Kchars/sec
    OpenGL Graphics Test 204.83
    Spinning Squares 204.83 259.84 frames/sec
    User Interface Test 217.47
    Elements 217.47 998.09 refresh/sec
    Disk Test 86.72
    Sequential 51.04
    Uncached Write 19.79 12.15 MB/sec [4K blocks]
    Uncached Write 93.54 52.93 MB/sec [256K blocks]
    Uncached Read 76.85 22.49 MB/sec [4K blocks]
    Uncached Read 241.09 121.17 MB/sec [256K blocks]
    Random 288.15
    Uncached Write 125.52 13.29 MB/sec [4K blocks]
    Uncached Write 307.13 98.32 MB/sec [256K blocks]
    Uncached Read 1892.45 13.41 MB/sec [4K blocks]
    Uncached Read 469.39 87.10 MB/sec [256K blocks]
  • ktolani Level 1 (0 points)
    relieved to know that apple has been working on this issue and a fix is coming SOON!

  • albertocvr Level 1 (0 points)
    The matter is that I can´t believe a serious company like apple came out with a product like this ...untested ..., yesterday I tried the new 27" 3.06Ghz with Ati 256Mb and I can´t believe what I saw ... an ¡ extremely slow machine ! , even an old pentium III pc works faster ... so I will delayed my i-mac purchase..
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