Leopard and PowerPC G4

Hi all...I am in a dilemma.
I have a Mac Mini G4 1.4GHz with 1GB RAM. My hard disk is failing, so I have to replace it, so I thought this would be an opportune time to install Leopard...
The question is, will it work on my G4?????
someone please help me answer this...any information would be helpful.

The question is, will it work on my G4?
Yes, it will.
(35893)

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Leopard and PowerPC applications

I've almost convinced myself to buy a new iMac and would appreciate knowing how Word 2004 and Final Draft 7, both written for the PowerPC, will run on Leopard. I seem to recall some dissatisfaction with earlier hardware/software configurations running these programs on Intel machines.
Thanks for any information you can pass along.
George

Office 2004 apps runs perfectly. Just ensure that you've updated to 11.5.0. I don't know the other app, so you'll have to check it's website for Leopard compatibility. BTW, check out http://discussions.apple.com/thread.jspa?messageID=1872713 before migrating from the old machine.

External Hard Drive Partitioned to boot both Intel and PowerPC -and backup

Have been remiss backing up drives, do it sporadically and have had a few close calls and am now trying to upgrade my skills.
I work with 3 computers - 2 intel MBP Core Duo (one Leopard, one Tiger, difference Ghz, screen size, generation) and PowerPC G4-running Tiger. I read recently you can partition a drive and format one as a bootable drive for an intel, the other for a powerPC.
http://www.macosxhints.com/article.php?story=2006061610374449
I'll have to read the instructions a couple more times before I get it. But what do people think - have any of you done it? Problems?
I have a further question or questions: I saw an external drive for the Mac 1000GB at OWC!!! Yikes, there is also one for 1500 GB!!!
I wondered how many partitions I could make - can I create a bootable drive in three separate partitions, and use those as a backup drive for each? Money is an issue, I can't afford a drive for each computer, so this would be the most economical.
Could I create a 4th partition, just to move photos, music libraries without their being computer specific (e.g., check share library?)
Is there any advantage in creating a boot drive that just starts the computer, but keep the backup files separate, or is cloning the drive then doing incremental backups the best so it is both a boot drive and a backup?
This is beyond my skill set and I am still fuzzy about backup software and boot drives and how they all interconnect - so far I have just been saving desktops and font folders to my oh so slow USB EXTERNAL HD (200 MB) periodically, or specific key files. Is there anyone who can walk me through this?
Thanks
Annexit

Partition the drive using Disk Utility, I'd recommend one bootable clone partition per machine, one partition for archiving (data you want to keep but not on a machine), and optionally one partition for a Time Machine backup for the Leopard system. Use the Apple Partition Map (under options in the Partition tab). Note that you'll read that Intel machines require GUID partition scheme, but that's only for installing the OS from a DVD, not relevant for cloning. You'll want APM to boot the PPC machines. Bootable clones can be sized equal to the internal HDDs being backed up, or slightly smaller. Partitions should be formatted as Mac OS Extended (Journaled).
Personally, I have two external drives set up identically, with partitions for bootable clones of a PPC machine with 10.4 and two Intel machines running 10.5, plus an extra partition where I store movie projects. I use SuperDuper to update the bootable clones. I have two drives because I store one offsite (at work). Every few days I bring an updated backup drive to work and the other one home.

Is there a workaround so for Leopard and iCloud yet?

I have an iMac PowerPC on Leopard at work and a MobileMe account which syncs my iPhone4 (iOS4), iPad1 (iOS4), my work iMac (Leopard) and my home Mac Pro (Snow Leopard). Syncing works perfectly. I love it.
I've been holding off on updating my MacPro to Lion and my devices to iOS5 and iCloud because I REALLY don't want to lose the ability to use Leopard Addressbook and iCal at work.
I just hate the thought of my iMac Addressbook and iCal databases not being sync'able anymore rending them useless, certainly more and more as I add to my calendars and contacts on my other 3 devices with my iMac out f the loop since you can't go farther than Leopard on a PowerPC.
If there is no way to keep my iMac in the synch "loop" after upgrading to iCloud, I guess I'll be forced to use my iPad or iPhone Contacts and Calendar at work and have them sync to iCloud so at least my iPhone, iPad and MacPro will be in sync.
What a shame. I know I'm not alone. I can't get work to buy me a new Mac (especially since everyone else is on PCs) just so I can use my computer's Addressbook and iCal applications. Otherwise it's still a viable computer.
I'm hoping there's some 3rd party programmer out there working on solving this issue. There are just too many Leopard computers out there with lots of life in them to become obsolete because of iCloud. What a strange way to kill a computer product and OS line.
S

The problem with the post above is that events created in ical don't sync to icloud,ical can only retrieve it from the cloud,so I tried something to solve that.
Just figured out how to get an icloud-account in ical for Leopard 10.5.8
you'll find the info in:
~/library/calendars/[the calendar that ends with] .caldav/info.plist
Open the info.plist with textedit
somewhere down the page you'll find <key>PrincipalURL</key>
underneath this:
<string>https://p02-caldav.icloud.com:/XXXXXXXXX/calendars/YYYYYYYY-YYYY-YYYY-YYYY-Y/</string>
X.....being your unique ID
Y.....being the calender ID
In ical:
-Click create account
-description = whatever name you like
-user name= apple id
-password=apple id
-server options= https://p02-caldav.icloud.com/[your unique ID]/principal/
This creates the icloud account.
Than:
-export a calendar to the desktop
-drag the calendar on the icloud account
there's your icloud calendar!
click 'get info' from that calendar and you will see the url that should connect to icloud but......it doesn't!
Can anyone help me with that please?
I tried a thousand different url's but I can't get ical to connect with icloud.
Greetz Frank

Leopard and Lion on the same hard drive

So I do need tu run PowerPC Apps sometimes too and I have installed Leopard on the same hard drive (partitioned of course) as Lion is, because I dont have other hard drives.
Anyway, I do have a little problem and it's about the Spotlight. Whenever I search for something from Lion it also searches from Leopard and it is a little bit annoying.
Can I somehow disable Spotlight to search from Leopard when I'm booted on Lion and vice versa?
Thank you

Found the solution System Preferences -> Spotlight -> Privacy

HT1338 Why can't I install Leopard for PowerPC on my old Mac Mini?

Why can't I install Leopard for PowerPC on my old Mac Mini? The massage "This can not be installed on this computer" appears.

My thoughts are that your difficulties could be one of these:
your non-retail DVD may only work on a very limited range of Mac minis
the installer may not like your new RAM
the installer may not like the language change especially if the disk has not been erased first
I have seen a little evidence for 3 in the code of other Leopard install DVDs - they appear to have less stringent language checks for erased volumes. Whilst I have never modified model specific installers I have modified retail installers to ignore speed and RAM checks.
My advice:
back up your whole mini hard disk to an external disk - see notes
erase the hard disk and partition into 2 volumes with Leopard install DVD
try to install Leopard on one volume
put original OS on the other volume
Notes:
Carbon Copy Cloner can be used to backup the whole hard disk
ensure the mini can be booted from the external disk before you erase the internal disk

We need to upgrade from Leopard to Snow Leopard and then on up the chain. How?

We have an old MacBook running Leopard (10.5.8). Can we upgrade to Snow Leopard and then add others gradually untill we get to the newest version? If so, were can we find a copy of Snow Leopard?

Before embarking on a major OS upgrade, it would be wise, advisable and very prudent if you backup your current system to an external connected and Mac formatted Flash drive OR externally connected USB, Thunderbolt or FireWire 800, Mac formatted hard drive. Then, use either OS X Time Machine app to backup your entire system to the external drive OR purchase, install and use a data cloning app, like CarbonCopyCloner or SuperDuper, to make an exact and bootable copy (clone) of your entire Mac's internal hard drive. This step is really needed in case something goes wrong with the install of the new OS or you simply do not like the new OS, you have a very easy way/procedure to return your Mac to its former working state.
Then, determine if your Mac meets ALL minimum system install requirements.
To install Yosemite, you need one of these Macs:
iMac (Mid-2007 or later)
MacBook (13-inch Aluminum, Late 2008), (13-inch, Early 2009 or later)
MacBook Pro (13-inch, Mid-2009 or later),
MacBook Pro (15-inch or 17-inch, Mid/Late 2007 or later)
MacBook Air (Late 2008 or later)
Mac mini (Early 2009 or later)
Mac Pro (Early 2008 or later)
Xserve (Early 2009)
Your Mac also needs:
OS X Mavericks, Mountain Lion, Lion, or Snow Leopard v10.6.8 already installed
2 GB or more of memory (I strongly advise, at least, 4 GBs of RAM or more)
8 GB or more of available space
Next,
If you run any older Mac software from the earlier PowerPC Macs, then none of this software will work with the newer OS X versions (10.7 and onward). OS X Snow Leopard had a magical and invisible PowerPC emulation application, called Rosetta, that worked seamlessly in the background that still allowed older PowerPC coded software to still operate in a Intel CPU Mac.
The use of Rosetta ended with OS X Snow Leopard as the Rosetta application was licensed to Apple, from a software company called Transitive, which got bought out, I believe, by IBM and Appe could no longer secure their rights to continue to use Rosetta in later versions of OS X.
So, you would need to check to see if you have software on your Mac that maybe older than, say, 2006 or older.
Also, check for app compatibilty here.
http://roaringapps.com/
If you have any commercial antivirus installed and/or hard drive cleaning apps installed on your Mac, like MacKeeper, CleanMyMac, TuneUpMyMac, MacCleanse, etc. now would be a good time to completely uninstall this apps by doing a Google search to learn how to properly uninstall these types of apps.
These types of apps will only cause your Mac issues later after the install of the new OS X version and you will have to completely uninstall these types of apps later.
Once you have determined all of this, you should be able to find the latest version of OS X Yosemite by clicking on the Mac App Store icon in the OS X Dock and then login to the Mac App Store using your Apple ID and password.
You can then begin the download and installation process of installing OS X 10.10 Yosemite from the Mac App Store.
Good Luck!

HT204053 I had Snow Leopard and was using iWeb and Filezilla for my website (not MobileMe). Wanting to move to single-click publishing, I now find it is not supported by iCloud and Mountain Lion. I feel cheated, having bought it mainly for this purpose!

I had Snow Leopard and was using iWeb and Filezilla for my website (not MobileMe). Wanting to move to single-click publishing (supported by MobileMe), I now find it is not supported by iCloud and Mountain Lion. I feel cheated, having bought it mainly for this purpose! The other thing they don't tell you is that Mountain Lion disables OfficeMac, and I am considering uninstalling it for that reason - do I get my money back?!

You stated; "Mountain Lion disables OfficeMac"
That is not true.
Mountain Lion does not have Rosetta so it is not capable of executing PowerPC code. If you have MS Office 2004 that is coded in PowerPC code and will not run in Mountain Lion. What you need to do is upgrade to an Intel version of Office.
Allan

I have 10.6 8 Sno Leopard and trying to download yosemite by it keeps failing. Are there other operating systems in between that need to be installed first?

I have 10.6 8 Snow Leopard and trying to download yosemite by it keeps failing. Are there other operating systems in between that need to be installed first?

Before embarking on a major OS upgrade, it would be wise, advisable and very prudent if you backup your current system to an external connected and Mac formatted Flash drive OR externally connected USB, Thunderbolt or FireWire 800, Mac formatted hard drive. Then, use either OS X Time Machine app to backup your entire system to the external drive OR purchase, install and use a data cloning app, like CarbonCopyCloner or SuperDuper, to make an exact and bootable copy (clone) of your entire Mac's internal hard drive. This step is really needed in case something goes wrong with the install of the new OS or you simply do not like the new OS, you have a very easy way/procedure to return your Mac to its former working state.
Then, determine if your Mac meets ALL minimum system install requirements.
To install OS X 10.8 Mountain Lion, 10.9 Mavericks (free upgrade, but currently unavailable) or OS X 10.10 Yosemite (currently available free upgrade) you need one of these Macs:
OS X 10.8 Mountain Lion purchased emailed download code here.
http://store.apple.com/us/product/D6377Z/A/os-x-mountain-lion
iMac (Mid-2007 or later)
MacBook (13-inch Aluminum, Late 2008), (13-inch, Early 2009 or later)
MacBook Pro (13-inch, Mid-2009 or later),
MacBook Pro (15-inch or 17-inch, Mid/Late 2007 or later)
MacBook Air (Late 2008 or later)
Mac mini (Early 2009 or later)
Mac Pro (Early 2008 or later)
Xserve (Early 2009)
Your Mac also needs:
OS X Mountain Lion, Lion, or Snow Leopard v10.6.8 already installed
2 GB or more of memory (I strongly advise, at least, 4 GBs of RAM or more)
8 GB or more of available space
Next,
If you run any older Mac software from the earlier PowerPC Macs, then none of this software will work with the newer OS X versions (10.7 and onward). OS X Snow Leopard had a magical and invisible PowerPC emulation application, called Rosetta, that worked seamlessly in the background that still allowed older PowerPC coded software to still operate in a Intel CPU Mac.
The use of Rosetta ended with OS X Snow Leopard as the Rosetta application was licensed to Apple, from a software company called Transitive, which got bought out, I believe, by IBM and Appe could no longer secure their rights to continue to use Rosetta in later versions of OS X.
So, you would need to check to see if you have software on your Mac that maybe older than, say, 2006 or older.
Also, check for app compatibilty here.
http://roaringapps.com/
If you have any commercial antivirus installed and/or hard drive cleaning apps installed on your Mac, like MacKeeper, CleanMyMac, TuneUpMyMac, MacCleanse, etc. now would be a good time to completely uninstall this apps by doing a Google search to learn how to properly uninstall these types of apps.
These types of apps will only cause your Mac issues later after the install of the new OS X version and you will have to completely uninstall these types of apps later.
Once you have determined all of this, you should be able to find the latest versions of OS X by clicking on the Mac App Store icon in the OS X Dock and then login to the Mac App Store using your Apple ID and password and if you purchased a download code, input that code.
You can then begin the download and installation process of installing the newer versions of OS X from the Mac App Store.

How do I find the hardware specs? (iMAC, PowerMac G3 and PowerPC)

For starters I have never used a mac before
We have some iMACs, PowerMac G3s and PowerPCs in stock which have had their HDDs erased (zero'd) so there is no OS installed.
I need to find the CPU type/speed & RAM size
Is there a boot cd I can load to determine this?
I assume there is no BIOS feature like in PCs where the hardware is listed?
Many thanks
Paul

A "boot CD" for a Mac is the Mac OS X installation disc that comes with it. You obviously don't have that... Mac's should always be sold with its original discs, but that's a pipe dream, I suppose.
The next best thing is a retail Mac OS X installation disc. These are the discs Apple sells "in a box" to owners of existing Macs in order to upgrade to the latest OS release. If you get one for Panther (10.3) or Tiger (10.4), startup from it by holding down the C key. When you get to the first Installer screen, go to the Apple menu and select +About This Mac+. That will tell you processor type, processor speed, and amount of RAM installed.
Make sure it's a retail disc. They are black with a silver X. Mac OS X installation discs that came with a particular Mac model (usually gray color) will usually not work on other models.
The current OS release, Leopard (10.5), would not be a good choice for this purpose because many G4 and below Macs cannot run it.
Tiger will work on all PowerPC Macs that originally had a G4 and have at least 256mb of RAM. It will also work on slot-loader G3 iMac (not tray-loaders), Blue and White Power Mac G3 (not beige), PowerBook G3 (only the model with FireWire) - not earlier G3 models.
Panther will work on all PowerPC Macs that originally had a G4 and most G3's that have at least 128mb of RAM, so it may be the best choice for this purpose.
There are some G3 Macs that need to have a firmware upgrade before running Mac OS X (even the installer) for the first time. This is particularly harmful to slot-loading G3 iMacs.
http://support.apple.com/kb/HT1395
If most of the Macs have a FireWire port, and you have an external FireWire drive, you should install either Panther or Tiger on that drive. Then you can boot each Mac from that external FireWire drive and run System Profiler to get more detailed information about the system. Mac OS X installations are generalized, so as long as a PowerPC Mac ran the installation, it should work with supported PowerPC Macs. Some Macs do not have FireWire. USB external drives are not bootable on most PowerPC Macs.

Problem with Snow Leopard and file sharing

I mostly work at home where I have an 18 months-old intel iMac 24'' running Leopard and an older iMac G5 20'' (PowerPC) running Tiger. Besides, I have a three months-old MacBook Pro 17" in which I recently upgraded the system to Snow Leopard.
Before this upgrade I never had a problem with the sharing of files between the three computers (I have them connected via Ethernet and a 5-port D-Link router wich provides flawless internet connection to the three computers). However, after the upgrade it has become impossible to connect the MacBook to the iMac G5 or vice versa via afp. Besides, getting the MacBook to connect to the (Leopard) iMac 24'' is frustratingly slow in either direction.
A related problem is the fact that after the upgrade the portable is no longer capable of seeing directly my ethernet-connected laser printer (to one of the ports of the D-Link router) although... surprise! it does see it as a shared printer in the iMac G5 and this way it prints alright.
Any ideas or suggestions to explore the cause of or solve this problem are warmly welcome.
Emilio Faro

Same problem here, did you find a solution?

Snow leopard and photshop elements 4

Hi. Apple have transferred photoshop elements 4 onto my new imac with snow leopard and I find I can't pull photos through from the iphoto library using the "open" facility in pse4. Is this an unsolvable scenario - or is there a wrok around?

Welcome to Apple Discussions!
As far as I could tell, I couldn't run Photoshop Elements 4 on an Intel Mac. Version 6 is available and can run from an Intel Mac. You might be able to change PSE 4 to be Intel Mac compatible if your plugins aren't PowerPC based by selecting Open in Rosetta from the application's Get Info window in the Finder.
If that doesn't work http://www.lemkesoft.com/ 's GraphicConverter is a low cost alternative to Photoshop Elements on Snow Leopard.

Snow Leopard and idsdk5 / CS3

Hi,
Any other developers trying to develop using idsdk5 for CS3 using Snow Leopard and XCode 3.2.1 ? Adobe says it is an unsupported configuration.
I don't like to downgrade, and am wondering if there are others with the same issue and possible solutions?
Thanks,
Remco

>> SLow Leopard (the old one)
LOL!
Thanks for the other tips - most are news to me.
Let's comparing some more notes!
Here's a few things I believe (I won't say 'I know' - I have no hard proof, and I don't have a budget to investigate getting hard proof )
I had extremely frustrating debugging issues with Xcode 3.1 - most of the time breaking into assembly code instead of showing the source code. No clear pattern: same breakpoint hit the first time shows the source code, second time assembly code. Fiddling with 'back arrows' sometimes got the source code to show up. It got so bad that I often had to revert to command-line debugging using gdb. Also a lot of 'mumble mode' - things just ................ coming to a pizza-colored cursor for no ................ apparent reason.
As a result, I've gotten into the habit of doing my coding and debugging on Windows XP with Visual Studio - once you get rid of the C-compiler RSP files and put the include paths into your project file instead, it works rather nicely, and to me it feels much faster than Xcode, even in a virtual machine.
I still do a lot of coding and debugging with InDesign CS on Windows/VS2003 - turnaround times (launch/debug/exit/...) are so much faster.
With Xcode 3.2.x on Snow Leopard things seem to work much better - so I might start to gravitate back to Mac-based debugging; time will tell.
CodeWarrior is over for me - I only use it to generate release versions (I still have some PowerPC macs around 'just in case' I need to debug something with CodeWarrior, but it's not been necessary).
As to Windows debugging: I use both Parallels and VMware, and my gut feeling is that Parallels seems to work quite a bit faster. Totally subjective, and probably unfair (the virtual machines have different histories, etc...) - but currently I find myself a lot in Parallels, with a virtual machine stored on an external USB drive connected to my laptop - I have heaps of virtual machines around, too many to store on the internal HD. Even with the slow USB bus 'underneath' it all, it works well.
With VMware I get a lot of mumble mode - machine non-responsive for minutes at a time, even with the virtual machine on the internal HD. Parallels has not done that to me (yet).
Another thing (might be fixed in Snow Leopard) - but have you ever had it happen that your InDy CS3 and CS4 plug-ins suddenly get a folder icon instead of a plug-in icon? Typically, all plugins will exhibit that behavior when it happens.
It's something with the package/bundle stuff, and the Finder getting confused. This is my unconfirmed theory: the Finder accepts a whole host of bundle formats, and the bundle structure used by the Adobe sample projects is 'iffy' - the Finder supports it, but occasionally, the Finder gets confused, and shows these plug-ins as folders (and that then further leads to customer support requests).
Now, if you go into the plugin package, it looks different from most other packages I've seen.
Here's how I fixed it: I added another build phase to the target - a 'Run Script' called 'Restructure Bundle'. I've put in the following shell script (using /bin/sh):
rm -rf $TARGET_BUILD_DIR/$PRODUCT_NAME.InDesignPlugin/Contents
mkdir $TARGET_BUILD_DIR/$PRODUCT_NAME.InDesignPlugin/Contents
echo InD3InDn > $TARGET_BUILD_DIR/$PRODUCT_NAME.InDesignPlugin/Contents/PkgInfo
mv $TARGET_BUILD_DIR/$PRODUCT_NAME.InDesignPlugin/Resources/Info.plist $TARGET_BUILD_DIR/$PRODUCT_NAME.InDesignPlugin/Contents
mv $TARGET_BUILD_DIR/$PRODUCT_NAME.InDesignPlugin/Versions $TARGET_BUILD_DIR/$PRODUCT_NAME.InDesignPlugin/Contents
mv $TARGET_BUILD_DIR/$PRODUCT_NAME.InDesignPlugin/Resources $TARGET_BUILD_DIR/$PRODUCT_NAME.InDesignPlugin/Contents
mv $TARGET_BUILD_DIR/$PRODUCT_NAME.InDesignPlugin/$PRODUCT_NAME $TARGET_BUILD_DIR/$PRODUCT_NAME.InDesignPlugin/Contents
That 'restructures' the plug-in bundle and makes the problem go away - AFAIK the Finder has never gotten confused with one of my home-grown bundled plug-ins.
The whole point might be moot, though - for all I know the original problem of the Finder getting confused might be long fixed...

Snow leopard and rosetta

I have a couple of questions about snow leopard and rosetta.
1. Quicken uses PowerPC code. Will Rosetta install automagically when I start Quicken or do I need to install Rosetta as part of the install.
2. Assuming a Quicken update in the not too distant future, and assuming that other Rosetta apps are banished from my computer, is there a way to de-install Rosetta code when it is no longer needed?
Thanks

sdevan,
First, I'm not sure why you are that concerned over Rosetta, other than the fact that universal binary apps will always run at least somewhat better than the PPC equivalents. There are still many PPC machines in the install base, so PPC code (and thus Rosetta) will not be going away any time soon. But, your questions...
1) Obviously, Rosetta must be present within OS X in order for you to run PPC applications. No one knows yet whether or not Rosetta will be installed by default. I very strongly recommend that you carefully review the options within the Snow Leopard installer when you run it.
2) Again, we don't know. I would think it would be rather difficult to get rid of everything associated with Rosetta, if it exists as part of OS X. I wouldn't recommend trying, and in truth, I see no reason why one would want to do so. There would be no benefit.
Scott

Shes slow! Tiger or leopard and whats acl?

HI sorry guys but im not very techy so i dont know if ill explain myself properly here but here are my powerbooks details first anyway.
Shes about 3 years old.
Model Name: PowerBook G4 15"
Model Identifier: PowerBook5,6
Processor Name: PowerPC G4 (1.5)
Processor Speed: 1.67 GHz
Number Of CPUs: 1
L2 Cache (per CPU): 512 KB
Memory: 512 MB
Bus Speed: 167 MHz
Boot ROM Version: 4.9.1f3
System Memory
Free: fluctuates between 85 and 95 MB
Wired: circ 96MB
Active: circ 256MB
Inactive: Circ 68MB
Used: Circ 421MB
Supposedly overall ive 20 GB free.
Dont know if ye need all that but anyway my problems are as follows.
Everything from programs opening to scrolling down or even highlighting a menu is painfully slow.Im seeing the beach ball constantly.
I cant open anything while burning a disc.
I upgraded from Tiger to Leopard recently hoping it would help milder versions of these problems but its just become worse. Should i just go back to Tiger?
Ive run Disk Utility and usually it comes up with a few things that it fixes but today it came up with a list a mile long filled with lines of
ACL found but not expected on "System/Library/User Template/da.lproj/Library/Audio".
ACL found but not expected on "System/Library/User Template/ko.lproj/Library/Fonts".
ACL found but not expected on "System/Library/User Template/zh_TW.lproj/Public".
ACL found but not expected on "Applications/Utilities".
ACL found but not expected on "Applications".
for example. Someone said i could have a virus! Is that possible on a mac?!
Any advice would be great!
Thanks guys.
Gemma.

Hi, Gemma. You can ignore all the ACL messages, according to this Apple article:
http://support.apple.com/kb/TS1448?viewlocale=en_US
It has nothing to do with a virus.
Your computer (which is Aluminum, not Titanium) has the bare minimum RAM for Leopard, and that's hard on performance. If you had performance issues while you were still running Tiger, upgrading to Leopard (which requires twice as much RAM) was not the way to resolve them.
Have a look at these two FAQ articles and try the tips provided in them:
http://www.thexlab.com/faqs/performance.html
http://www.thexlab.com/faqs/maintscripts.html
Message was edited by: eww

Leopard and PowerPC G4

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