I have a mid 2009 MacBook Pro and had it upgraded to 8GB RAM within 2 years after I bought it. At an authorized retail store, where I bought it. No problem. Except that it also has the original 160 GB HD. Performance is not great the last year or so, wondering if it would improve with a 512SSD HD, and upgraded OS. Currently 10.6.8. I did replace the battery once, but did not notice extra heat with the upgraded 8GB RAM.
The 8GB RAM has served me well. I'm no techie, but I would guess that the OS, HD and RAM all would affect performance in different ways. Anyone know???
I stand by my previous comments. I cannot upgrade to OS Sierra 10.12.4 on this Mac running on El Capitan 10.11.6. The 15 inch MacBook Pro was returned to Apple when it was still under AppleCare. Don't try to teach your Granny or Grandad in my case to suck eggs.
I did not delete my posts, because the information I posted was correct.
Don't preach to me about learning. I went to University when I was 34 years old and graduated with a BSc (Hons). I got my Master's degree at 67 at Lancaster University, and am currently studying for a PhD in IT and Applied Research.
So if I didn't delete my posts who did, and for what reason ? I have worked as a moderator for several Mac related forums and only moderators could delete posts or the site owner. If any Tom, Dick or Harry can delete posts, then you won't see me on this site again. Cherio Mayer et al.
There is a patch to update your MacBook Pro operating system to High Sierra macOS. Follow this link to reach that request:
por Mohsen Mehrvarz
Mac post 2011 can upgrade to osMac 10.13.2. Within weeks, there was a security update for some Macs, then a OS upgrade for 10.13.2. Here in UK we are ripped off. If it costs $1500 in US, it will cost £1500 in UK, and cannot buy from US if UK resident.
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