To get information about your Mac click the apple (screen top left) and select About this Mac. This will give you your OS number. Then click More Info to see which Processor you have. If it says PowerPC you cannot upgrade to Snow Leopard and above as they are Intel only. You can discover more about various Macs at: http://www.apple-history.com/
The OS numbers and names are:
OS X 10.4.x - Tiger
OS X 10.5.x - Leopard
OS X 10.6.x - Snow Leopard
OS X 10.7.x - Lion
OS X 10.8.x - Mountain Lion
If you have an Intel Mac it is well worth upgrading to Snow Leopard now and then considering other options after that.
You can buy Snow Leopard here:
For details about upgrading this to Lion or Mountain Lion see:
In each case check that your Mac complies with the requirements.
If you are not in the US you should use the Change Country link at the bottom of the page.
Thank you for your very informative advice, but something very strange is happening. I have just tried the link for 10.5.8 as you recommended, and it said the page is not available. Have they stopped anyone upgrading. I am stuck in limbo, I cannot upgrade. I have had serious problems and need to get up to date. Thanks
You will find free combo updates for OS X 10.5 here:
Ring Apple if you wish to purchase Snow Leopard.
Contact details for the UK are here:
Contact details for the US are here:
Other countries can be selected at the bottom right of these pages.
I went onto your first link, but I can only find a combo update for the version I have (10.5.8) and no higher. Is the next one 10.5.9 or 10.6? either way, I cannot see it. Please could you take a look for me and see if I have missed it. Sorry to put you to trouble.
By the way, I am in the UK.
Yes I have got the software update enabled. I am a little confused though. I thought I had to move up to mountain lion in order to keep my mac up to date. When I tried to buy mountain lion, I got a message up saying that I had to have 10.6 or above to get mountain lion. Am I ok to stay as I am then?
If you have serious problems, they should be fixed first before you upgrade.
If you wish to upgrade, you need to check out what version of OS X your Mac is capable of supporting.
Once you have fixed the problems and know what you Mac can support, the next step would be to purchase the Snow Leopard DVD and upgrade to it.
Then update to 10.6.8 once there the next step depends on what your Mac is capable of running.
Before starting any of these steps you should backup your data.
A couple of months ago I had a situation where everything on the computer kept staling and my Chrome kept cutting out. I tried the usual things like clearing cache, cookies etc, but nothing worked. I ended up getting Mac Keeper to see what was wrong, and found out I have viruses and trogens. Anyway, that has been sorted now, I have mostly have problems with pages 'snapping' at the moment.
How do I find out what version of OS X my Mac supports please