Snow Leopard and MBP 8GB of Ram?

We know already that the late 2008 2.4GHz MBP Unibody supports up to 6GB of ram. The 2.53 and 2.6 support 8GB.
The question is will this same MBP support 8GB of ram when Snow Leopard is released? Is it a hardware or 32-bit/64-bit addressing problem that limits the 2.4GHz MBP?

"Is it a hardware or 32-bit/64-bit addressing problem that limits the 2.4GHz MBP?"
Are you referring to the memory limitation? No.

Similar Messages

Help - upgrading from Tiger to Snow Leopard AND new larger hard drive, MBP

Howdy!
My iPhone has finally demanded that I upgrade my MBP from Tiger. And as if by coincidence, my now puny 100GB internal drive is packed full with less than a gig free most of the time. (10% free is the MINIMUM free allowance, I know!!) I run old copies of Adobe CS2, Quark, Quickbooks, Microsoft Office... would love to keep them working without purchasing upgrades, but probably isn't a realistic hope. None of it is mission critical at this point.
So I've purchased the $29 Snow Leopard DVD (from a reseller - it says CPU Drop-In DVD Version 10.6 on the disk), and a new 750GB internal drive (same reseller - The drive is a 2.5" SATA 5400RPM 8MB-Buffer Hard Drive (9MM Slim) (RoHS Green Friendly)), to get with the times.
My other resources include:
- two 1TB LaCie external drives with FW and USB2 ports
- one other LaCie external drive - I think 360GB?
- Retrospect 5.0 (most of my backups are encrypted Retrospect files on those three LaCie external drives, but there's some room on them)
- a $22 USB 2.0 to SATA/IDE adapter with AC power, to access whatever laptop drive might be without an enclosure temporarily
- a copy of Carbon Copy Cloner software
- I just ordered an upgrade to my ancient (OS9) copy of DiskWarrior
- A monster UPS battery backup and line conditioner that everything plugs into for this process
It has been a long time since I've DIY'd any undertaking this complex, and I'm looking for advice on what to do first, how to go about this.
Here's my setup:
Model Name: MacBook Pro 15"
Model Identifier: MacBookPro1,1
Processor Name: Intel Core Duo
Processor Speed: 2.16 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache (per processor): 2 MB
Memory: 2 GB
Bus Speed: 667 MHz
Boot ROM Version: MBP11.0055.B08
SMC Version: 1.2f10
I'm guessing I should do it like this, PLEASE EDIT or make suggestions or tell me what I forgot to do before I do it!!
1. Back up everything to at least two external locations! Also, make a bootable copy of my current internal drive in its own volume, to at least one external drive that is formatted in HFS+ GUID partition style, with Carbon Copy Cloner (would Retrospect work well for this instead?).
2. Free up at least 20GB on the current internal drive (100GB). Hopefully 30GB.
3. Run Disk Utility on the current internal drive. Fix any problems. (Should I hit it with DiskWarrior instead?)
4. Format the new 750GB drive to HFS+, GUID partitions. (How long will that take? Can I do it with the USB-SATA cable adapter, sitting on my desk, or does it have to be in an enclosure? The adapter has AC power)
5. Run Disk Utility (or DiskWarrior?) on the new internal drive in its temporarily external position. Fix any problems.
6. Boot off the Snow Leopard CPU Drop-In DVD and install onto both drives. (Will this version of the DVD I have wipe all files when it installs to a disk???)
7. See how they run. Boot off the old 100GB internal drive, boot off the new to-be-internal 750GB drive. Panic if it's not going well.
8. If the current internal 100GB drive is rocking Snow Leopard and my familiar files and apps seem somewhat functional, use Carbon Copy Cloner to recreate the volume on the new larger drive. Then swap the drives physically. (Links to good step-by-step instructions on this part would be much appreciated here!!)
9. If the Snow Leopard DVD overwrote or snuffed out my familiar files and apps on the old internal drive, sigh deeply, then swap the drives physically. Use CCC (or Retrospect? or Migration Assistant?) to fetch my junk from the old internal drive's backup and plunk it on the new bigger internal drive (now installed).
10. See how it runs. Shake my fist at the sky over the planned obsolescence of technology paired with the seductive power of my iPhone. Grumpily upgrade the software that I actually create income with.
Please help! I am just faking it here based on a few message boards I've read. Will this actually work properly?
Thanks!

Howdy slowpoke43, and a warm welcome to the forums!
Please help! I am just faking it here based on a few message boards I've read. Will this actually work properly?
LOL, if your faking it you're the best!
1. Yes, absolutely... no CCC would be best in my experience/opinion.
2. Yes, the more he better... Free Space is no longer our Free Space, but OSX's.
3. Indeed, & if you have the correct version of DW, do that.
4. Yes, not long, A/C power is great.
How to format your disks...
http://www.kenstone.net/fcphomepage/partitioningtiger.html
(To Install OSX on an IntelMac the Drive it needs the GUID Partitioning scheme mentioned at the bottom.)
Thanks to Pondini, Formatting, Partitioning, Verifying, and Repairing Disks...
http://web.me.com/pondini/AppleTips/DU.html
6. Yes, boot off the 10.6 DVD, & no Snow Leopard does by default what we used to call an Archive & Install, saves & updates all your info, APPs, Music, etc., it may quarantine a few things or not but will tell you.
7. Absolutely, but Panic won't be needed with your great preparation & Bootable Backups!
8. Not quite sure I understand, but run SL for a few days before you do anything.
9. Yeah, but again with you doing everything right from the gitgo, I can't picture that happening.
10. Yes indeed, the hangup with yours is that it only holds 2GB of RAM... a pain in 10.5 & up IME.
Again let me say... GONGRATS, I've never ever seen anybody so well prepared & informed despite your diffidence!

Running snow leopard on MBP and am not getting an sound alerts for Mail or Calendar; Have checked all setting in sound in the system preferences

Running snow leopard on MBP and am not getting an sound alerts for Mail or Calendar; Have checked all setting in sound in the system preferences

Hi..
For Mail, from your Mail menu bar (top of your screen) click Mail > Preferences then select the General tab.
Click the pop up menu to the right of New messages sound to make a selection.

Snow Leopard and Adobe Photoshop CS4

Hi!
I've recently switched from custom built PCs to a Mac workstation, mainly for professional photography and editing purposes. I use photoshop roughly 12 hours a day (if not more...sigh), so switching to Mac would, in my mind, streamline and enhance my work experience.
...and it has!
However, Photoshop CS4 will often crash when doing a "Save as", which is the whole reason behind my post. I've tried fixes found around the internet (rebooting in Safe mode, turning Open GL off, reducing the ram used to 50%....I'm at the one where they're telling me to turn off and on the network...we'll see how that works!).
The other very strange thing with this whole thing, are 3 small scrambled windows that open with photoshop. I'll post a link to a screenshot :
http://img403.imageshack.us/img403/949/screenshot20100115at105.png
Obviously I'm posting this in this forum, because I haven't had any of those issues when I was on my PC.
Oh, and as for the crash, it's more like a constant spinning beach ball.
Any help would be appreciated.
Specs :
iMac i5
8GB o' ram
1 TB WD external USB2.0 drive attached, using Time Machine on it.
OSX 10.6.2

Have you talked to Adobe about this issue? I have used Photoshop CS4 on Snow Leopard, and havn't seen any issues. However, the scrambled windows look like what Top Sites in Safari looked like before they (supposedly—I still get it occasionally) fixed it in 10.6.2.
Speaking of which, try re-installing the 10.6.2 combo update.
Also, try using the uninstallers to remove Photoshop (don't forget to deactivate first), and then re-install it.

Am using Macbook pro mid 2010 running on OSX 10.9.5. It does not read my old Seagate back up plus ITB ext hard disk which opens and works on snow leopard. The back ups were made on snow leopard and mountain lion. How do I make it work on Mavericks?

I have been making back ups on a Seagate Back up plus drive on a macbook pro running on Mountain lion. Sadly the mac was stolen and all I had was the seagate back up. I tried opening it on my old iMac running on snow leopard and after several visits to this forum managed to open it. The data was safe and sound. Now I have received a hand me down macbook pro which runs on osx 10.9.5. I'm assuming there is a compatability issue as the drive does not come on at all when I hook it up to the usb port. I checked the seagate drive once again on the imac and its light came on on that system. Then I suspected there may be a problem with this macbook pro usb port. But it seemed to work fine when i hooked my camera cord into it. Is it that I must reinstall mavericks. In which case how do I back up before reformatting or reinstalling. BTW I did the command+ R thingy and repaired my internal Hard disc which was showing errors. What do I do next, your help is most appreciated if you have had a similar problem.

Your 2010 MBP would be able to handle Yosemite, but I would strongly suggest that you get the current problem sorted out before trying to upgrade to Yosemite. I'd also recommend another backup that isn't created by Time Machine if you are thinking of upgrading. SuperDuper and CarbonCopyCloner can make bootable clones of hard drives. If you clone your existing system to a fresh external drive, you would be able to boot from that drive and recover quickly in the event that your Yosemite upgrade didn't work out. Time Machine backups are not 100% reliable.
It's possible that, if your internal HD is the one that shipped with your MBP in 2010, it may be failing. If it keeps needing repairs, that is probably a sign that it is approaching the end of its useful life.
Have you run Disk Utility's Repair tool on the external drive as well?
I mentioned the hub because some people have reported here that attaching their USB 3 drives through a USB 2 hub solved some disconnection problems. A good-quality powered USB 2 hub won't cost much.
My most recent brush with random disconnections involved a nice new OWC drive enclosure. I used the cable that came with the drive, but the drive kept disconnecting. Using a different cable solved the problem. You wouldn't expect that what appeared to be a high quality cable would be a problem straight out of the box, but it was.

How do I uninstall snow leopard and re-install OSX leopard?

How do I uninstall snow leopard and re-install OSX leopard?

Sorry to hear that, Snow Leopard runs as fast or faster than either Tiger and Leopard did on my Jan 2006 Early Intel iMac on 2GB of RAM?
Before you blame Snow Leopard, run the Extended Apple Hardware Test and check the SMART status of your Hard Drive to make sure that you do not have another problem.
http://support.apple.com/kb/HT1509
http://www.macupdate.com/app/mac/14825/smartreporter

How do I partition my MacBook Pro so I can keep Snow Leopard and also install Mountain Lion?

How do I partition my MacBook Pro so I can keep Snow Leopard and also install Mountain Lion?
I want to install the latest OS, but I already know that I will lose a lot of my software unless I can partition the hard drive and have two "bootable" drives.
How do I retain everything I have, partition the drive, then reloa the software I own according to which OS it will work under?

msmedia wrote:
I do not currently own OS X ML.
I am currently running OS X (10.6.8 Snow Leopard) on my MacBook Pro. It has a 2.8GHz Intel Core 2 Duo Processor. I want to upgrade to Mountain Lion, but many of my software titles will not operate with ML and I cannot afford to replace some of them (Adobe Creative Suite, for e.g.)
After I back-up my HD and then partition the HD, how do I use the back-up to reinstall what I want to the SL partition, and then place the rest on the ML partition.
I have not done what you want to do, so can only offer some general thoughts in support. Take value from the following where you can. No guarantees.
If it was me, I would use a disk clone utility (e.g. Carbon Copy Cloner) to image the existing Snow Leopard disk to an external drive. Then verify that the external drive would boot and run Snow Leopard normally.
I would then purchase and download the Mountain Lion upgrade installer, but not run it. Use Lion Diskmaker to make a bootable USB stick, and perform a clean install of Mountain Lion, replacing the Snow Leopard on your MBP. This way, you make absolutely certain that no third-party drivers or other SL cruft remains to make Mountain Lion unstable. Update to latest ML point release. Fix permissions. Let TimeMachine make a full backup of your ML installation to a different external drive. Then turn of Time Machine.
In Disk Utility, use the + sign at the bottom of the ML partition to add another GUID, HFS+ Journaled partition for Snow Leopard. Resize to taste. Name it differently from your ML partition. Exhale.
Now ideally, you would like to reverse the external clone and put it back into the new SL partition. Then fix permissions. And demonstrate that you can boot into individually stable OS X installations. This would save you alot of work. Resist copying your home directory into ML just yet.
If you cannot successfully achieve the preceding paragraph, you will be faced with a full SL and application reinstall.
The ~/Library contents for SL and ML are sufficiently different that you do not want to mix them. You may want to salvage Safari bookmarks.plist. And, ML created folders in the home directory may have different permissions or ACL settings than in SL. So, my rule of thumb would be to copy folders that you created in SL, and only the contents of matching named OS created folders such as Music, Pictures, Downloads, etc.
For each operating system, you probably want the Time Machine settings to exclude the opposite OS X partition. If you use the same host name in Sharing prefs, then you will mix SL and ML backups on the same Time Machine back up drive. If you use different host names, they will be distinct folders in the Time Machine backups.backupdb and allow discrete restores per host. You may also want to gag Spotlight from indexing the opposite OS X partition.

Snow Leopard and MS Exchange 2003 -USING OWA-

I have a new 27" iMac with Snow Leopard. I am trying to connect to my company's MS Exchange 2003 via OWA NOT IMAP or POP, OWA. I dont like mail.app or like using iCal for calendering. So I like OWA using Safari or FF.
I also have several other machines in my home office: 8 Macs (Dual G5 - Leopard, 27" iMac - Snow Leopard, G4 Mini - Leopard, 15" Powerbook - Leopard, 15" MacBook Pro - Snow Leopard, 24" iMacs - Snow Leopard, and quad Intel XServe - Tiger) and a couple of Dells one with XP and one with Vista. I'm a geek, can you tell?
On every machine using Leopard and Snow Leopard, I cannot connect to Exchange 2003 OWA using Safari or FF. It takes forever and then once I get the login dialog it eventually times out.
HOWEVER, on Tiger no mater if on Quad Intel XServe or the Dual G5 (I can boot Leopard or Tiger), there are no problems. There are no problems conecting or logging into Exchange via Safari or FF.
Also, to reiterate, XP and Vista on a Dell have no issues, nor does XP on Fusion 3.0 int the 27" iMac.
So it HAS to be related to Leopard and Snow Leopard. Remember it is not an issue of time outs after logging in as some posts on ArsTechnica suggests, here we cant even get to the exchange server in a timely manor. When I ping the server it just sits there.
Ping results
PING chilcoinc.com (72.215.225.9): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2
Request timeout for icmp_seq 3
And it just keeps going.
Frankly, I am ****** and don't know what I am to do. I need this access and dread having to be forced into using imap or pop.
Microsoft was been useless. Their solution is Exchange 2007, But they cant seem to understand that I do not want to use mail.app and ical. I want to use the OWA!
Thanks for any help you guys can provide.
Mark

From my MBP with 10.6.2 I can connect using OWA both to a hosted service running Exchange 2007 and an internal service running Exchange 2003.
It sounds as if there is a problem with the network configuration. Is there any firewall between your client system and your company server? Are you using the same IP information (DNS, GW, etc) on the client as on the other systems which work for you?

Can I dual boot snow leopard and mountain lion if I've installed boot camp on my drive

Can I dual boot snow leopard and mountain lion if I've installed boot camp on my drive

Yes as I said before. If your model Mac came with Snow Leopard and you are now running Mt Lion and have Windows installed in a Boot Camp Partition all you have to do is make the Mt Lion partition smaller, take the free space and make it another Mac partition and you should be able to install Snow Leopard into that partition.
I have Snow Leopard, Lion and Mt Lion installed on my MBP. No Windows in a Boot Camp partition because I run Windows XP in a Virtual Machine on both Lion and Mt Lion.

Tiger Upgraded to Snow Leopard and computer runs SLOW, SLOW, SLOW

I have Leopardcy and itch'n for a cure! Has anyone loaded Snow Leopard onto a Tiger, 4.0.?? operating system? I was told I could. I backed up the info I had in my computger on an external hard drive first, then loaded Snow Leopard. Now it runs so slow I could cry. It took 90 seconds to open Pages, 4 minutes to get onto Safari. The Geek Squad at Best Buy store said to reload Tiger, but first back up the current info onto my backup with Time Machine. Questions: If I take Snow Leopard out and reinput Tiger, will Time Machine still be there?? Is it now in my external so it will work or ???? What will be the ramifications of reloading Tiger??
I may need more RAM, but I don't know how to determine that. Any ideas of how to figure out what it is?
Any ideas are most appreciated. Thanks,

It sounds like you have very very limited RAM and very limited free hard disk space.
The lack of RAM causes the OS to attempt to buffer information to hard disk. The lack of hard disk space causes everything to become 'slower than molasses' as the system tries to find free space available on the hard disk.
I'm wondering if you read the installation requirements before you installed Snow Leopard?
Snow Leopard minimum requirements are 1Gb RAM (but note that MORE is recommended) and 5-7Gb available hard disk space, just to install it.
http://manuals.info.apple.com/enUS/Snow_Leopard_InstallationInstructions.pdf
Click on Apple, About This Mac, More Info. Memory shows how much RAM is installed.
Serial-ATA shows details about your installed hard disk but you have to scroll down to see how much disk space is in use and how much is available. If you have less than 10% to 15% of your hard disk free after installing Snow Leopard, you should get both a larger hard drive as well as more RAM (Snow Leopard runs pretty well in 2Gb).
Since it came with Tiger installed, I'm guessing you probably have a 2006 or 2007 1.83Ghz or 2.0Ghz MacBook with 512Mb or 1Gb RAM and an 80Gb or 120Gb drive. You can find factory specs for your model here:
http://www.everymac.com/systems/by_capability/mac-specs-by-machine-model-machine -id.html
TIme Machine was added with Tiger, OS X 10.5.x, so NO, *a Time Machine backup cannot be restored to Leopard, 10.4.x.* (And you now have a good reason to avoid that BB for future technical support.)

Since installing Snow Leopard and Lion two weeks ago, my iTunes program opens seemingly at will. It usually starts playing music, too. What is causing this?

Since installing Snow Leopard and then Lion on my Intel-based iMac two weeks ago, my iTunes program seems to open at will whenever the computer is on. It often begins playing music, as well. What is causing this and how do I make it stop?

There are ways to minimize, mitigate, and help avoid a lot of problems.
Bootable backups.
Zeroing a drive twice before using, and format it with SL DVD Apple Disk Utility for sure.
Even a clean install should import old apps without having to reauthorize.
If you must do an upgrade, do it from the SL DVD, after repairing the drive and be sure to use the SL version of Alsoft Disk Warrior (4.2).
Wait six months before jumping on a new OS.
10% is still too many. Yes, it is more sensitive to RAM and hard drive errors, doesn't like some controllers; most ext hdd cases; and enough software to make for test-only status. And it only IDs some known incompatible applications, drivers, extensions, etc and does not remove even those always in best manner.
Plus, there are problems with the new Rosetta and the cache files it now uses. So some apps and plug-ins will cause more trouble. Not all are ready. Good reason to hold off for the months it takes.
Other devices act different as far as on/off behavior.
(Migrating from G5s to Mac Pro can cause all kinds of problems, weird behavior, sluggish system, and why anyone that went down that road was strongly recommended to NOT use Migration Assistant for any of their applications, and to ONLY do clean/fresh installs of any apps. If you skipped that day, didn't read the Guide to M.A., or didn't want to do fresh installs then, your system could have been on borrowed time. If you did do clean install of applications, great.
Installing SL can result in a corrupt directory - I think and it "seems" to be happening, but no real proof, just gut feeling and instinct (underlying file system problem? weak sectors that pre-existed waiting to happen?).
Remember all the "there just aren't a lot of 64-bit drivers" for Vista and XP? it's come home to roost.
... my guess is not enough incense and offerings. To hop into TimeMachine and SuperDuper backup images and pull the 1TB for another day (week, month, year).

Snow Leopard and Airport...not doing so well altogether.

I upgraded from 10.5.6 or whatever it was in June when I left...when I came back my internet was dropping a little bit here and there...and when I upgraded to Snow Leopard and the install and reboot was all over, Airport dropped my internet so quickly. Rebooted my computer, reinstalled snow leopard, turned off airport, changed the IP, I believe I did everything I could to do get the internet to work.
Right now is weird because this is one of the times where it dropped, maintained, dropped and maintained again. As Im speaking it just dropped...and came back up. Im so sick of this. My sister doesnt have the same problem at all. ****! She can get on to the cisco clean access agent, and snow leopard isnt compatabile with that yet so I cant get on to the internet at school. I dont care about the internet at school..I need the internet at home more than at school.
So in short, can you guys tell me what steps to do that will get my internet to drop less..to mainly be like my sisters where she isnt ******** about it 24/7. She does NOT have Snow Leopard but 10.5.6 OSX or whatever it is now. A key note is that I dont have my OSX install cd's from the original 10.5.2 when I got my MBP, and I didnt set up time machine before I redid it. So Im stuck with this new OS. And you might say its the router or whatever but I swear to god its not, its my computer. I just need to know what I can do that can get my internet so it doesnt drop!!! Thanks guys!

I have a Mini and am experiencing the same. Started with wireless dropping every 20 minutes or so. Then it couldn't find signal so I moved my Time Capsule closer. I'm watching my transmit rate drop every few minutes from 58, then 24, then 18, then 12, now 1. The icon in the status menu doesn't change though. According to that icon I'm getting 4 full bars of signal. If I Option+right click then I see that I'm only at 1

Unable to set up a dual boot for Snow Leopard and Lion

I'm running an early 2011 MacBook Pro. I originally ran this machine with Snow leopard for quite a while. I've got 8 GB RAM and lots of free space on my hard drive. I upgraded to Lion and it works well. But I want to boot to Snow Leopard from an external drive to run some old Rosetta apps. However, I couldn't run the Snow Leopard installation disk on the Lion Machine. When I tried to boot to the installation disk, I would get a beeping sound during startup, three beeps in a row - repeating, and it would not boot. So I connected the external to another machine running Snow Leopard and I installed a new version of Snow Leopard on the external drive. But my Lion machine will not boot from that external. I am able to select the Snow Leopard drive in the Start Up Disk pane in the prefs. But when I restart, I just get the three beeps. I must be missing something here. Any help would be appreciated.

Not in cases when the computer successfully boots to one OS but produces three beeps when an attempt is made to boot it to another. If it really was a RAM problem that serious, the computer wouldn't get as far as checking the OS version, and it has no problems booting Lion. In the event of a minor RAM problem, it wouldn't produce three beeps like that at all.
(67955)

I recently updated? to Lion from 10.6.8(snow leopard), and things seem to be running slower. Has anyone had similar problems? I have Feb 2011 Macbook pro 13" 2.3 Ghz.

I recently updated? to Lion from 10.6.8(snow leopard), and things seem to be running slower. Has anyone had similar problems? I have Feb 2011 Macbook pro 13" 2.3 Ghz.

As Shootist pointed out, the system uses more power.
However, initially it will reindex the hard drive for spotlight, which will slow things down temporarily.
It also must rebuild caches that eventually will speed things up.
If it has completed indexing the hard drive (no dot pulsing in the spyglass), then there might be something wrong.
Start by booting into the Recovery HD (a partition created with Lion that has Disk Utility and reinstallation options) by holding down cmd-r when you restart. You can let go when the gray screen appears.
When it boots, select Disk Utility and Repair the drive.
If that doesn't speed things up, try re-installing the OS from the same Recovery HD. It won't delete any of your files, but it has helped some people whose Macs ran slow after installing Lion.
Also, how much memory do you have? Lion needs RAM so maxing your Mac out might also help.

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!

Snow Leopard and MBP 8GB of Ram?

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