About this Mac should tell you what model year it is. Since you mentioned it has a DVD/CD drive it means it's a pre-2012 model.
RAM will likely be 1333MHz or 1600MHz. No you don't have to take the machine to Apple to add more RAM. The access to RAM is on the back and is easy to get to.
Thanks for the info!
I found out that it's a "late 2009" model. woth 1067MHz DDR3
I'm a power-user developer/software dev on my Windows machine, but would appreciate the convenience of my iPhone, iPad, Macbook Pro being all in sync with my home desktop, so it seemed that an iMac might fit the bill.
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The fact that only two of the RAM slots are used is good news, makes it easier to upgrade (often you will find 4 x 2 GB inside). RAM is fairly cheap so you can buy 2 x 4GB or 2 x 8 GB to get to 16GB/24GB. As mentioned above the upgrade is easy, just requires a Philips screwdriver.
Things I would check:
- what version is it? I personally would avoid any with discrete GPU since they seem to cause more trouble when getting older
- take the serialnumber and go to http://www.appleserialnumberinfo.com/Desktop/index.php to confirm the specs (what is written in the 'about this Mac' section can be overwritten reasonably easily if one wants to trick a buyer)
- ask if the harddrive is the original one. Often, when replaced, a non-Apple HD is used (cheaper) which will result in an error because of the missing temperature sensor. This can be fixed via software (for example mac fancontrol) but is a (small) downside that should be reflected in the price
- run the built in diagnostics - hold D or command-D (depending on the model) to get there, then the mac will run a series of hardware tests by itself, so this will give you further peace of mind if it results in no errors found
- not sure about your question regarding ports? They are all situated on the back side of the iMac on the right side (looking at it from the front). If it is 2011 or earlier the USB ports are unfortunately only 2.0.
- Activation lock is not an issue on a Mac. What you want to make sure is that there is no firmware password set. You can find this out when starting in recovery mode.
Thanks for all that information! Particularly the serial number check - it got this info:
iMac "Core 2 Duo" 3.06 27-Inch (Late 2009) 3.06 GHz Core 2 Duo (E7600)
Intro.: October 20, 2009 Disc. July 27, 2010
Model: A1312 (EMC 2309)
Family: Late 2009
ID: iMac10,1
RAM 4 GB
VRAM 256 MB
Storage 1 TB (7200 RPM) Optical 8X DL "SuperDrive"
Complete iMac "Core 2 Duo" 3.06 27-Inch (Late 2009) Specs
If the above looks decent for what he's selling it for ($800) then I will try the diagnostics that you kindly mentioned.
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"Does it even work?"
Haha. I don't know of many but I would say to run the Apple diagnostics test, and check for UI lag. The UI lag makes them unusable so you want to make sure to not get stuck with one of those. GPU is a big factor in the 27 inch models.
Hey thanks - I'll arrange to play with it for a while and check that out. Also the diagnostics test.
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"Has it been apart?"
If the answer is yes:
"What did you do to it?"
"Does everything still work?"
"Has the RAM been changed?"
If the answer is yes:
"Do you still have the original RAM?"
"Will you offer any kind of warranty?" (even 30 days)
A 27" iMac won't have a CD drive.
It WILL have both ethernet and USB3.
If it's in a store, have them boot it up and leave it on for a while.
If possible, try Safari.
Try a few other apps.
Thanks for that information - at it happens it's a 2009 iMac, with CD drive. It was on at the store for about 10 minutes, but I'll take your advice and do some youtube / intensive stuff. Appreciate your info.