With your model number and serial number you can find out more exactly what
computer you have, the specifications, upgrade ceilings, what it shipped with
and a few other dozen things...
IF the computer is an iMac (27-inch, Late 2009) model, RAM specs are:
Maximum Memory | 32 GB (Core i5 or Core i7 Actual) 16 GB (Apple) |
---|
Memory Slots | 4 - 204-pin PC3-8500 (1066 MHz) DDR3 SO-DIMM |
---|
{as per specs from http://mactracker.ca download database}
•iMac: How to remove or install memory
http://support.apple.com/kb/HT1423
The general range of 'Late 2009' 27" iMac series could have a Core2Duo,
or a Core i5, or Core i7 processor, and one of a few graphic processors.
Model Identifier | iMac10,1 (Core 2 Duo) iMac11,1 (Core i5, i7) |
---|
Model Number | A1312 |
---|
EMC | 2309 (Core 2 Duo) 2374 (Core i5, i7) |
---|
Order Number | MB952LL/A (3.06 GHz), MB953LL/A (2.66 GHz) |
---|
If you wanted to follow the model number and serial number further, so
as to then later look into MacTracker &/or Everymac.com data, then a
search by Model number or Serial number could be a path. This site is
said to be a secure (lock icon) http:// page, and looks OK.
•Identify your Mac - Lookup your unit by Apple model or serial number:
https://www.powerbookmedic.com/identify-mac-serial.php
Anyway, if you get quality RAM upgrade chips that totally match the
specifications set by Apple, from either OWC macsales or Crucial,
these would likely help out somewhat.
Also check into a good backup solution, perhaps with two external HDD
units, one for TimeMachine and another with partition for OS X Clone as
well as space for additional storage off the computers hard disk drive.
Good luck & happy computing! 🙂