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Sorry, I made a typo. The latest version of Mac OS is OS Sierra 10.12.4 If you click on App Store, there is a download for this version, but trying to upgrade it gives a message as follows We could not complete your purchase. This version of mac OS 10.12.4 cannot be installed on this computer. Currently, I am running on El Capitan 10.11.6 on a MacBook Pro mid 2009.
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I have a 13 inch MacBookPro retina ( early 2015(, running on OS Sierra 10.12.4 also a 15 inch 2011 MacBook Pro running OS 10.12.4, my wife laptop, and a mini iPad which will only upgrade to iOS 9.3.5. I have been using Macs since 1992 and worked from home as a Apple Athorised Technician. At 76 years old I learn something every day. Hi, actually I had the same problem I guess, before water damage this summer, I was using my both slots (1st was 1 gb, 2nd was 4gb - I was thinking getting my 2nd 4gb for this semester:( and I was thinking I finally had 2x4gb=8gb ram ) however now if I use top slot giving me '3 successive tones, a 5 second pause (repeating): This indicates RAM does not pass a data integrity check.'
Error, so I am assuming my top slot is not working. I am planning to get 8GB 1 Ram but I wonder this is OK. And if you learn answer please let me know too, thanks 13 inch - Mid 2009 MacBook Pro 2.26 Ghz Intel Core 2 Duo. I also own a mid-2009 Mac Book and I managed to upgrade its RAM to 4GB (2 x 2GB) and to replace its HDD with an SSD. The next step I would like to make is to upgrade its RAM to 8GB (2 x 4GB), but when I write this message (in 2016) I cannot find DDR2 RAM’s any longer, leaving apart that they are fairly expensive. I would also like to replace its processor with a stronger one, say an Intel i3, i5 or even i7. Does anyone know if its motherboard supports such processors or where can I check this?
Thank you in advance. Hi, Daniel, 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.
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??? There is a bit of symbiosis between RAM & drives. When your system is running lean on RAM it will leverage the drive as virtual RAM. So if your system is low on free space you won't have that much space for the virtual RAM in addition over time HDD's tend to get fragmented so the free space maybe heavily scattered across the drive which slows access.
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So what to do?? The easiest thing here once you've maxed the physical RAM is to upgrade your drive to a larger unit. But even that may no offer enough.
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As it turns out there are hybrid drives (SSHD) which have a deep cache SSD to speed things up. But we have a small wrinkle here, the drive you need is no longer being made so you'll need to look for one on eBay or Amazon. You what to look for a You don't want the newer FireCude version! It is a fixed speed drive unlike this one which will run at the slower SATA II (3.0 Gb/s) speed your system runs at. Your other option is to get a while more expensive will also offer great performance.