Relative Noise Output of Intel iMac and Mac Pro

I run a computer based recording studio. I have been using a Powerbook for the last two or so years and I am thinking of upgrading to an iMac or Mac Pro.
However, noise is a sensitive issue for me. I have enjoyed near silence with the Powerbook, which enables me to hear into every aspect of my sound. I would like to continue enjoying that experience with an iMac or Mac Pro and wondered whether you could tell me how quiet these machines are? And whether there are any stats on the noise output of the Mac range?
Regards,
Stuart

I'm sure there were some noise figures published once for the G5 and MacPro but I've had a quick look and can't find them on the Apple site anymore.
In my experience the G5 is actually quite quiet compared with say a PC Workstation - that is until the Fans ramp up during heavy processing at which point it does get quite noisy. I expect the MacPro is similar in this respect.
Hope that helps a bit.
Rik

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HT201380 keep having scrolling problems with Maverick on both iMac and Mac Pro despite downloading mail software update

Have scrolling problems with Maverick despite downloading mail update on both IMAC and Mac Pro
Have to reboot and it helps for awhile then stalls again

The Mac OS X 10.4.7 Update introduced connection issues as a result of (according to the documentation) "Mail now supports connecting to mail servers through a SOCKS proxy". This probably has nothing to do with your problem, but it'd be worth going to System Preferences > Network and making sure the SOCKS Proxy is not enabled in the network configuration used to connect to the Internet.
Also, it looks like the crashes you're talking about are actually freezes, i.e. Mail becomes unresponsive rather than quitting unexpectedly. In Mail, open Window > Activity Viewer, and see whether Mail displays there what it's doing when it freezes. Actually, you may be able to avoid having to force quit Mail by canceling whatever it's doing (by clicking on the red stop icon of the activity).
Reinstalling Mail will probably accomplish nothing, but it might be worth reinstalling the Combo Update for the type of machine and the version of Mac OS X you're using (which you would have to do anyway if you wanted to reinstall Mail):
Mac OS X 10.4.7 Combo Update for Intel
Take a look at the following articles for guidelines on how to properly install system updates:
Troubleshooting installation and software updates
Installing software updates
Basically, you should verify/repair the startup disk before installing the update, and no applications should be running while installing it.

I opened my account on the MacAir and have the new Mountain Lion showing i purchased. When I open my account on my other two machines it does not show. Any suggestions on why or how to fix? iMac and Mac Pro Thanks

I opened my account on the MacAir and have the new Mountain Lion showing i purchased. When I open my account on my other two machines it does not show. Any suggestions on why or how to fix?
iMac and Mac Pro
Thanks

SADLY not as i downloaded an upgrad to my original PAGES/
i have in the meantim had to open www.icloud. then from there import the file that i am working on and then check on ipad if it uploaded/ yes it did.
but what a waste of time as it doesn not save any changes done automatically back in the cloud....
i am now downloading the new LION and hope that it will fix the problem
i cant find any other way. I was lead to believe that you wrote, it saved automatically, on to the cloud, you then opened anohter device in anotother country even, and the new file was there, waiting, in its latest version.......
and the same magic was supposed to happen in reverse.
It doesn't/
if i have to open a browser, go to www.icloud....why on earth did they not just leave us an icon to drop it in in that case?
I hope the new lion will help resolve the isssue/
any other ideas> keep em coming...thank you so much.

Void between the iMacs and Mac Pro's.

The iMac is a powerful system but lack of PCI slots, single display does not work for everyone.
I want to upgrade and sell my G5 Dual 2.3 and move on to intel macs. A core 2 Duo Intel mac with PCI slots and multi display support will suit my purposes just fine.
I could go Macbook with external display but if its a machines i will carry around, i dont feel comfortable carrying my main studio machine around.
Or maybe i just haven't gotten out of the mindset and accepted an iMac as a super professional machine.
Do i make any sense at all ?
ps: Who's running an iMac as their main studio machine in atleast a semi-pro environment where clients come in regularly. And how do a FW interface and Harddrive behave together........ ?
<Edited by Moderator>

Faisal Baig wrote:
Does anyone else feel that Apple should have kept atleast 2 lower end options for those who want to be on a Mac Pro, but cant afford them.
They had moved to a "4 core" base model some time ago and you can still configure it with 4 cores you just get 1 Quad instead of 2 Duals. The cost is the cost of the system my friend but it is a pro workstation that you will have no need to upgrade from for a long time. These Intel's have a good lifespan compared to the G5s.
Faisal Baig wrote:
A core 2 Duo Intel mac with PCI slots and multi display support will suit my purposes just fine.
No such Mac.
Faisal Baig wrote:
Or maybe i just haven't gotten out of the mindset and accepted an iMac as a super professional machine.
For audio its not.
Faisal Baig wrote:
Do i make any sense at all ?
Sure you do!
Faisal Baig wrote:
And how do a FW interface and Harddrive behave together........ ?
Main problem with the iMacs is the lack of expansion as you have pointed out. You will always have devices competing for bandwidth on the internal FireWire bus. Also the FireWire bus is only as fast as the slowest device on the tree so you can lose performance quickly that way. With expansion ports you can record in one bus and write out another and get much better performance that way. But with 4 drive bays on the MacPro you won't need to write out a bus except for backup or if you were to get an external RAID.
Cheers!

What is the difference between iMac and Mac pro?

I want to buy an iMac but have saw the mac pro. What is the difference? Do you need an iMac to get a mac pro or does it come with a monitor?

Yes, exactly as Kappy has stated.
The iMac is an "all-in-one" computer similar to an HP Envy, or HP Touchsmart.
HP Envy Here: http://tinyurl.com/bb-hp-envy
HP Touchsmart Here: http://tinyurl.com/bb-hp-touchsmart
These are an "all-in-one" machine, where the CPU (central processing unit), mainboard, and graphics display adapter are all embedded onto one board, and it is built-in to the monitor display case.
So you just have what looks like a "thicker" monitor on your desk and your keyboard connects to this "all-in-one" computer. (and actually the newest 2012 iMacs are not really that "thick" at all, and it does look pretty nice/thin/sleek).
The disadvantage to an "all-in-one" is that it's not easily upgradeable. You can't change out the graphics cards, or install new PCIe expansion cards (faster network cards, RAID adapter, etc.), can't add extra internal hard drives (i.e. 4 internal hard drives), etc.
The Mac Pro is a standalone computer. It requires an additional monitor/display. The advantage of having a Mac Pro is that it is upgradeable (you can get more powerful graphics cards in the future if you need better 3D rendering power) and it has far more memory slots, so it can be expandeable to I believe 128GB of RAM (whereas I believe the iMac might be 32GB of ram?)
iMac memory expansion here: http://www.apple.com/why-mac/compare/
Mac Pro Memory expansion here: http://eshop.macsales.com/shop/memory/Mac-Pro-Memory#1333-memory
Also the iMac is a much thinner device, and you can't separate the display from the CPU (they are an "all-in-one" device) so you can't upgrade or change the primary display, but you can add a second display).
With the Mac Pro, you can add additional graphics cards, and you can power up to twelve displays (if you wish). You also have a much more powerful processor on the Mac Pro (one quad-core, or up to two 6-Core Intel Xeon processors). So the Mac Pro a much more powerful machine.
The iMac is just a nice cute/thin desktop display (all-in-one), but with a quad-core processor it's still a fairly fast/decent machine.
If you are doing heavy 3D graphics rendering or gaming, or graphics design (3D CAD, etc.) then I would probably go with something more powerful like a Mac Pro, since you can get better graphics cards, and the Mac Pro will run much cooler (as you're trying to do massive rendering).
> Do you need an iMac to get a mac pro or does it come with a monitor?
No, you don't need an iMac for a Mac Pro (they are two separate and different computers), but yes you do need an external monitor display if you buy a Mac Pro.
Any 1920x1080p monitor/display with an HDMI input will be sufficient for using with a Mac Pro.

HT1175 Using G-Raid to backup iMac and Mac Pro laptop

Has anyone atttempted to backup both machines to a Hitachi G-Raid with one partition? If they have, was it by direct USB 2.0 wire using AirPort Express for the Mac Pro and direct fire wire to the iMAC?
Any thoughts on this would be appreciated.
Len

leonardfromoshawa wrote:
To backup in the future requires hooking up each machine individually and using TM.
To do it that way, yes, but that's not your best bet.
First, having both sets of backups made directly, in the same partition, may present problems later on. See Time Machine - Frequently Asked Question #4 for details.
Second, the inconvenience of switching back and forth means both Macs won't get regular backups. If you do switch frequently, there's the risk of damaging a port or plug.
Your best bet is to partition the drive. Continue backing-up the iMac to one partition directly. Leave the drive connected to the iMac, and back the laptop up to the other partition via your network. See Time Machine - Frequently Asked Question #33 for details, and #22 for setup instructions. That way, both will be backed-up hourly, as long as they're awake and the laptop is in range of your network.
Will my original question of using AirPort Express work
No. You cannot connect a drive to an Airport Express's USB port, only a printer.

Deciding between iMac and Mac Pro

My current desktop computer (a PC) is basically dead. It is under extended warrenty but the custom build place I got it from tells me nothing is covered (because of their negligence but they won't admit that) And basically they want me to pay out of pocket for a brand new computer.
However after having a Macbook Pro for a year and loving it I decided to just change my desktop over to a Mac which I want to purchase by the end of October (or if this computer gives out before then earlier) However I just can't decide between an iMac or a Mac Pro.
The 2 big things are video editing at the moment just Final Cut Express and gaming when/if I get a chance. The iMac I'm looking at is the 3.06 GHz, with 4 GB ram, and a Geforce 8800GS video card. On the Mac Pro side it'd be more or less the Stock Mac Pro with 2.8 GHZ Quad core x2, 4 GB Ram, and I'd purchase the ATI HD 3870 video card for it.
The other difficulty is I do need a new monitor as well with the iMac a new monitor isn't an issue but with the Mac Pro it's extra and I guess I'm trying to debate if the difference between the 2 computers is really worth the cost. I'd like for the new computer to last me 3-4 years maybe a bit longer so it's just a matter of which is better for my needs. Is the Mac Pro really worth it over the iMac? I know I cant replace anything in the iMac but if it can do me for awhile I don't see why that'd be a downside
The other factor is, buying at the end of october, is it wise or should I try and get as much life out of my dead PC and try and wait for the next iMac/Mac Pro refresh?
Thank you to everyone who replies with their opinions.

The biggest advantage of the MacPro is its expandability. Yes, it is faster too, but is the speed difference worth the extra cost? Looking at what you can expand in a MacPro (unlike PCs which can be swapped out component by component until nothing but the case is original equipment) I decided that expandability was too limited to be worth the price and the speed increase wasn't either.
In the past I'd bought a Mac tower and kept it 5 years, over those five years upgrading the graphics card, swapping out the CPU, bigger drives, etc. I looked at the MacPro and concluded there wasn't much I would or could do to expand it other than a bigger hard drive or more hard drives and more memory. Maybe a better graphics card. Meanwhile, I could buy an iMac, keep it for 2 1/2 years, sell it, buy a new iMac and keep it for 2 1/2 years and wind up spending less (thanks to the high resale values of Macs).

Connecting an imac and mac pro help

Hi,
I'm looking to buy an 8 core Mac Pro and an iMac 27", what I'd like to do is connect them so I can use the iMac for the display and also join the processors and ram to run as one computer. I will be using this computer for Logic Pro and Ableton.
Is this at all possible?
Thanks Jeff

The early 27" iMac could be connected to a Mac Pro's Mini DisplayPort for use as an external display
<http://support.apple.com/kb/HT3924#>
but the iMac's processor and RAM would not be available for any computing.
The current 27" iMac uses Thunderbolt, so will not work with a Mac Pro.
<http://support.apple.com/kb/TS3775>

Between iMac and Mac Pro

Hi everyone!
I am a lifelong PC user looking to switch to a Mac. Because I like some windows programs and gaming, I am still a little bit reluctant (less since Macs can run windows) to buy an apple computer mainly because i like computer video games.
I feel like if I buy an iMac I would spend a lot of money for the all-in-one design (granted, it's amazing) while I only need a desktop computer without a screen. Also, if I go with a Mac Pro, it's a little bit out of my price range...
Bottom line : do you think apple is developing some product to bridge the difference between an iMac and a Mac Pro for customers like me?
Thank you

OK, first the bad news is that we aren't allowed to speculate on future products real or fictional on this forum, read the Help & Terms of Use to your right.
However that being said you don't mention what games you like to run so it's difficult to speculate if an iMac is the right machine for you or not. Take a look at this link where there is an imbedded link to View of the iMac Graphics chart it describes games performance with different graphics cards:
http://www.apple.com/imac/features.html
If you still feel an iMac doesn't have enough power then you could always purchase a Mac Pro, they start at $2499 which just means you would need to save a little longer to buy one.
There are a lot of people that have switched to Mac's from PC's with similar concerns as yours, I would also recommend searching through the forums to get some additional information and maybe the direction they took. However be forewarned if you do decide to get a Mac you'll probably never want to use Windows again.
Regards,
Roger

From iMac to Mac Pro for the good of my Pro Tools 10...

hey guys,
here's the deal : it seems I'm at a turning point with my iMac (27", 3.1 Ghz i5, 4GB memory, 1TB hard drive, lion, PT10) and I'm thinking of buying a mac pro. Problem is, I'm not sure which model is best for my needs. I do postproduction work for television and I often have to work with pretty heavy projects.
My pro tools 10 keeps giving me the same 2 errors --
1- DAE can't get audio from the drive(s) fast enough. Your drive may be too slow, or fragmented, or a firewire drive could be having trouble due to the extra firewire bandwidth or cpu load. (-9073)
2- A CPU overload error occurred. If this happens often, try increasing the "H/W Buffer Size" in the Playback Engine Dialog, or removing some plug-ins. (-6101)
I might add, my Playback Engine's maxed out and I'm barely running any plugins (some 5 or 6 EQ3s, maybe 1 or 2 L2 and a Dorrough).
I have a MOTU Audio Express which is plugged in firewire and I'm running an external drive with my SFX on it, which is also plugged in firewire. The iMac having only one firewire plug (downsizing from the earlier iMac, for some obscure reason), I have a firewire hub.
I get the first error whenever I get too deep into a project and I start having a lot of SFX and I'm looking to add more and I get the second error whenever I try to run Dolby Media Meter.
I'm pretty aware I'm overrunning my iMac, so I'm willing to pay big bucks to get a computer that's best fitted to my needs and which I'll be able to upgrade every once in a while. Now, I'm just wondering what I actually need in a computer.
It's either the 3.2 GHz quad-core intel xeon, 6GB memory, 1TB HD or the two 2.4GHz 6-core intel zeon, 12GB memory, 1TB HD. I gotta say the second one seems kind of a lot... but I don't want to spend so much money and get a tiny upgrade from where I'm at right now.
So please! All of you mac wizards and other knowledgeable folks, HELP!

An i7 3.9GHz would do if you had 32GB RAM, an SSD boot drive, and 2TB hdd.
The sweet spot today on Mac Pro is $1800 4-core special and DIY to W3690 or W3680 6-core 3.33 or higher with 32-48GB RAM. And lots of SSDs and disk drives.
http://store.apple.com/us/browse/home/specialdeals/mac/mac_pro
Refurbished 27-inch iMac 3.4GHz quad-core Intel Core i7
http://store.apple.com/us/browse/home/specialdeals/mac/imac/27
The Mac Pro line is at a - not ready to ship the new 2013 6,1 model / not ready with 10.9 that it will need / and current configuration is really 2010 3 yrs old (but also how well they hold up and mature).
You do not want to give up GHz for more cores. MHz still rules. Only reason would be if you planned to replace the processors for the fastest expensive (use to be, though changing) 4 or 6-core 3.4GHz for total of 8 or 12-cores, but never the 2.4GHz, no way.
The 2009 4,1 used is cheaper and can be found for $1000 and upgraded to 6-core and everything else (dual core upgrades are harder and not good to plan for.
And http://www.barefeats.com has done some tests on iMac and Mac Pro.
Graphics on Mac Pro, RAM and PCIe and SSD, hdd are easy upgrades.
This site has some great tips
http://www.macperformanceguide.com

2 iMac & 1 Mac Pro render a job of Maya

Hi all!
I have a LAN with 3 machines: 2 iMac 2GHz - 2GRam and MacPro 2.4GHz - 2GRam. And I'm use QMaster2 to render a small project Maya( This project, if batch render with 1 machine just take 1min).
My setting:
first iMac have been setting with: Services and cluster controller.
second iMac and MacPro have been setiing with: Services only.
So, I'm rendered. It is successful.
But i have some problems.
1. How to distribute batch. It seem not distributes in my job.
2. Time to render is very slowly. something wrong??????
3. Just MacPro submit a job to cluster, second iMac didn't add job in QMaster. Why that ???
please help me !!!!!!!!!!
Thank.
Thanh.

An i7 3.9GHz would do if you had 32GB RAM, an SSD boot drive, and 2TB hdd.
The sweet spot today on Mac Pro is $1800 4-core special and DIY to W3690 or W3680 6-core 3.33 or higher with 32-48GB RAM. And lots of SSDs and disk drives.
http://store.apple.com/us/browse/home/specialdeals/mac/mac_pro
Refurbished 27-inch iMac 3.4GHz quad-core Intel Core i7
http://store.apple.com/us/browse/home/specialdeals/mac/imac/27
The Mac Pro line is at a - not ready to ship the new 2013 6,1 model / not ready with 10.9 that it will need / and current configuration is really 2010 3 yrs old (but also how well they hold up and mature).
You do not want to give up GHz for more cores. MHz still rules. Only reason would be if you planned to replace the processors for the fastest expensive (use to be, though changing) 4 or 6-core 3.4GHz for total of 8 or 12-cores, but never the 2.4GHz, no way.
The 2009 4,1 used is cheaper and can be found for $1000 and upgraded to 6-core and everything else (dual core upgrades are harder and not good to plan for.
And http://www.barefeats.com has done some tests on iMac and Mac Pro.
Graphics on Mac Pro, RAM and PCIe and SSD, hdd are easy upgrades.
This site has some great tips
http://www.macperformanceguide.com

SilverKeeper backup doesn't work correctly with Intel iMac and 10.4.8

I use SilverKeeper 1.1.4 to backup daily to a LaCie drive. But it will no longer do automatic backups (that is, wake computer from sleep at 6am before I start the day) since I migrated from PowerBook G4 to new Intel iMac 24". It only starts the backup when I come and wake computer, not by itself, which it had done before...The SilverKeeper people have been unable to help me.
New Intel iMac 24" Mac OS X (10.4.8)

Could very well be that SilverKeeper's scheduling function no longer works with 10.4.8. Let me suggest alternatives that do:
1. Deja Vu
2. Synk (Backup, Standard, or Pro)
3. Synchronize! Pro X
All are universal binaries. You can find them at www.versiontracker.com or www.macupdate.com.

SilverKeeper stopped working correctly with Intel iMac and 10.4.8

I use SilverKeeper 1.1.4 to backup daily to a LaCie drive. But it will no longer do automatic backups (that is, wake computer from sleep at 6am before I start the day) since I migrated from PowerBook G4 to new Intel iMac 24". It only starts the backup when I come and wake computer, not by itself, which it had done before...The SilverKeeper people have been unable to help me and I have jumped through all the hoops.. permissions, reload SilverKeeper, trash prefs, etc etc.. nothing works
Intel iMac 24" Mac OS X (10.4.8)

Could very well be that SilverKeeper's scheduling function no longer works with 10.4.8. Let me suggest alternatives that do:
1. Deja Vu
2. Synk (Backup, Standard, or Pro)
3. Synchronize! Pro X
All are universal binaries. You can find them at www.versiontracker.com or www.macupdate.com.

I have elements on both my iMac and mac book. On my mac book i can't hold down left click on the pad and on the right hand side move tools i.e. clone, erase tools etc

i have elements on both my iMac and mac book. On my mac book i can't hold down left click on the pad and on the right hand side move tools i.e. clone, erase tools etc

Please post Photoshop Elements related queries over at
http://forums.adobe.com/community/photoshop_elements

I am on a intel Imac and need to update to 10.5. How can i do this?

I am on a intel Imac and need to update to 10.5. How can i do this?

You really should update to Snow Leopard because Leopard is no longer in production. The following tells you about Snow Leopard but also what's need to upgrade past Snow Leopard should you be able and wish to do so.
Upgrade Paths to Snow Leopard, Lion, and/or Mountain Lion
You can upgrade to Mountain Lion from Lion or directly from Snow Leopard. Mountain Lion can be downloaded from the Mac App Store for $19.99. To access the App Store you must have Snow Leopard 10.6.6 or later installed.
Upgrading to Snow Leopard
You must purchase Snow Leopard through the Apple Store: Mac OS X 10.6 Snow Leopard - Apple Store (U.S.). The price is $19.99 plus tax. You will be sent physical media by mail after placing your order.
After you install Snow Leopard you will have to download and install the Mac OS X 10.6.8 Update Combo v1.1 to update Snow Leopard to 10.6.8 and give you access to the App Store. Access to the App Store enables you to download Mountain Lion if your computer meets the requirements.
     Snow Leopard General Requirements
       1. Mac computer with an Intel processor
       2. 1GB of memory
       3. 5GB of available disk space
       4. DVD drive for installation
       5. Some features require a compatible Internet service provider;
           fees may apply.
       6. Some features require Apple’s MobileMe service; fees and
           terms apply.
Upgrading to Lion
If your computer does not meet the requirements to install Mountain Lion, it may still meet the requirements to install Lion.
You can purchase Lion by contacting Customer Service: Contacting Apple for support and service - this includes international calling numbers. The cost is $19.99 (as it was before) plus tax. It's a download. You will get an email containing a redemption code that you then use at the Mac App Store to download Lion. Save a copy of that installer to your Downloads folder because the installer deletes itself at the end of the installation.
     Lion System Requirements
       1. Mac computer with an Intel Core 2 Duo, Core i3, Core i5, Core i7,
           or Xeon processor
       2. 2GB of memory
       3. OS X v10.6.6 or later (v10.6.8 recommended)
       4. 7GB of available space
       5. Some features require an Apple ID; terms apply.
Upgrading to Mountain Lion
To upgrade to Mountain Lion you must have Snow Leopard 10.6.8 or Lion installed. Purchase and download Mountain Lion from the App Store. Sign in using your Apple ID. Mountain Lion is $19.99 plus tax. The file is quite large, over 4 GBs, so allow some time to download. It would be preferable to use Ethernet because it is nearly four times faster than wireless.
     OS X Mountain Lion - System Requirements
       Macs that can be upgraded to OS X Mountain Lion
         1. iMac (Mid 2007 or newer)
         2. MacBook (Late 2008 Aluminum, or Early 2009 or newer)
         3. MacBook Pro (Mid/Late 2007 or newer)
         4. MacBook Air (Late 2008 or newer)
         5. Mac mini (Early 2009 or newer)
         6. Mac Pro (Early 2008 or newer)
         7. Xserve (Early 2009)
     Are my applications compatible?
         See App Compatibility Table - RoaringApps.
     Am I eligible for the free upgrade?
         See Apple - Free OS X Mountain Lion upgrade Program.
     For a complete How-To introduction from Apple see Upgrade to OS X Mountain Lion.
How to Install OS X Updates Successfully
A. Repair the Hard Drive and Permissions:
Boot from your current OS X Installer disc. After the installer loads select your language and click on the Continue button. Then select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger) and/or TechTool Pro (4.5.2 for Tiger) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
B. Make a Bootable Backup Using Restore Option of Disk Utility:
1. Open Disk Utility from the Utilities folder.
2. Select the destination volume from the left side list.
3. Click on the Restore tab in the DU main window.
4. Check the box labeled Erase destination.
5. Select the destination volume from the left side list and drag it to the
      Destination entry field.
6. Select the source volume from the left side list and drag it to the
      Source entry field.
7. Double-check you got it right, then click on the Restore button.
Destination means the external backup drive. Source means the internal
startup drive.
C. Important: Please read before installing:
1. If you have a FireWire hard drive connected, disconnect it before installing the update
      unless you will boot from this drive and install the update on it. Reconnect it and turn
      it back on after installation is complete and you've restarted.
2. You may experience unexpected results if you have installed third-party system
       software modifications, or if you have modified the operating system through
       other means. (This does not apply to normal application software installation.)
3. The installation process should not be interrupted. If a power outage or other
      interruption occurs during installation, use the standalone installer (see below)
      from Apple Downloads to update. While the installation is in progress do not use
      the computer.
D. To upgrade:
Purchase the Snow Leopard Retail DVD.
Boot From The OS X Installer Disc:
      1. Insert OS X Installer Disc into the optical drive.
      2. Restart the computer.
      3. Immediately after the chime press and hold down the "C" key.
      4. Release the key when the spinning gear below the dark gray Apple
          logo appears.
      5. Wait for installer to finish loading.
      6. Follow instructions.
E. If updating:
1. Download and install update(s)
2. Use Software Update, or
3. Download standalone updater(s).

Relative Noise Output of Intel iMac and Mac Pro

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