I have an old MacBook.  It is currently running OS X 10.5.8.

I have an old MacBook.  It is currently running OS X 10.5.8.I really just use it to manage my photos, internet, etc. I need to upgrade software to get latest itunes to sync w iphone 5s. Do I 1st need to download snow leopard? I want to make sure I go in the correct order.  Will the upgrades affect my time machine?

Looks like your computer is a MacBook (13-inch, Aluminum, Late 2008)
lower build, according to the model number 5.1;  in Mactracker database.
Introduced
October 2008
Discontinued
June 2009
Model Identifier
MacBook5,1
Model Number
A1278
EMC
2254
Order Number
MB466LL/A (2.0 GHz), MB467LL/A (2.4 GHz)
If so, (without second verfication by serial number lookup) RAM info is:
Built-in Memory
None
Maximum Memory
8.0 GB (Actual) 4.0 GB (Apple)
Memory Slots
2 - 204-pin PC3-8500 (1066 MHz) DDR3 SO-DIMM
Minimum Speed
Interleaving Support
Yes
That means the slots in the MacBook 5.1 should support up to 8GB between
the two locations, so that's two 4GB chips; best if matching, replaced together.
•MacBook - How to remove or install memory:
http://support.apple.com/kb/ht1651
The better spec RAM may be found for MacBook models at OWC online:
http://eshop.macsales.com/shop/memory/Apple_MacBook_MacBook_Pro/Upgrade/DDR3
Be sure to match the specs and if ordering by phone, have your MB serial
number handy so they can match the parts correctly with the build year.
Hopefully this helps. The info on upgrading shows that could go to Mavericks
but the practical reasoning is be careful if you have older applications due to
a non-support of older ones when you go above Snow Leopard w/ Rosetta.
Also, some users of older Macs have issues with Mavericks, though supported.
Good luck & happy computing!

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