I have a late 2008 15" MBP with 8Gb of Ram, running OSX 10.8.5. She is a good old girl but I'm running into limitations (Particularly Adobe CC) in upgrading to newer versions of software, receiving error messages stating that that update is requires OSX 10.10 or 10.12, or some newer level OSX than I have. I have heard of people having serious troubles after upgrading on these old girls. Slowdowns and other problems, wishing they never upgraded to the newer OSX, and I think I remember hearing that you can't go back if there are problems with the OSX upgrade. I really could use the software updates, but I can't have a problem that inhibits or reduces the operation of my computer, I use it daily. I get weekly prods from Apple that updates are available and it wants me to upgrade to the newest, latest and greatest (?) OSX Sierra. Im good at operating macs and using software. Troubleshooting, or internal problems, not so much so I'm not looking to create trouble. So I would appreciate the opinion of those well versed in the mechanics of this area of hardware/ OSX compatibility. Will the old girl handle an upgrade to Sierra, am I opening a Pandora's Box of problems, or do I have any other options that might work better for me? Thanks in advance for your time and assistance.