Hi I was recently given a free old iMac from work and was wondering if I posted the specs someone would be able to let me know how (and if) I can update the OS? I currently don't have a computer or laptop and for photography I need something with a decent screen and something I can run Lightroom on. That's all I'll be using the iMac for (and iTunes). I tried downloading iTunes the on it the other day but it said I couldn't as my OS was too old. The specs are as follows: Version: 10.5.8 Model: iMax5,1 Processor: Intel Core 2 Duo Processor Ppeed: 2.33 GHz No. of Processors: 1 Total no. of Cores: 2 L2 Cache: 4MB Memory: 1GB Bus speed: 667 MHz Boot ROM version: IM51.0090.B00 Questions: 1) Can I update the OS? If so, what do I need to do? 2) If I manage to update it, will it still be fast enough to use Lightroom effectively? 3) What year of model is this? 4) Is it worth selling and then saving up for a new iMac? If so, what could I get for it in the UK? Not really used iMacs before so please treat me like a newbie! Thanks in advance.