Memory normally refers to RAM. Temporary, high-speed storage used to keep frequently accessed information available for use and helps keep the computer running smoothly

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Strange QuickLook Error

I recently installed an SSD (m4 crucial latest firmware) with TRIM enabled on my late 2011 MBP 13". I did a clean install of Mountain Lion 10.8.1, enabled FileVault 2 and everything was working fine ...
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109 views

iMac boots with one RAM, but not two

I've got a curious little problem going on over here. I've got an old late 2006 iMac (the white one). Was sportin' 1gb of ram, so I went and bought some more (4gb). Actually I bought two of those, and ...
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1answer
1k views

Why does OS X use virtual memory when I still have free RAM?

I have this awesome MacBook Pro with 8 GB of RAM. When I open up Activity Monitor it would seem that I have plenty of RAM available, but my computer seems to prefer to use virtual memory for many ...
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929 views

Macbook Pro doesn't wake up from sleep, RAM slot empty after force restart

My mid-2009 Macbook Pro, running Mountain Lion, very often does not wake up from sleep. When I open the lid, there is a black screen, but the fans are still running. My only option is to force reboot ...
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2answers
409 views

Configure MacBook Air at Apple Premium Resellers in Singapore

I am Abhimanyu, located in Singapore. I have a question for you all: Can I configure MacBook Air at one of the Apple Premium Resellers? I want to buy 13" MacBook Air, but I need 8 GB Memory, instead ...
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1answer
833 views

How to launch jar the same way Jar Launcher does

The source of this problem is that Jar Launcher (/System/Library/CoreServices/Jar\ Launcher.app) runs the jar just perfectly (as far as I know, the Jar Launcher app is the one that runs jars which you ...
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2answers
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The free vs. inactive memory ratio on a Mac with 16 GB RAM has me concerned

I am looking for clarification since I am seeing large allocations of RAM on my Mac. I have 16 GB of RAM and recently installed Windows 7 on Parallels. When the machine runs, I see 3.55 GB Free memory ...
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3k views

Disable inactive memory swapping

Background: OSX keeps some information in RAM that is no longer used, but was recently used. This is called inactive memory, and is intended to improve user experience by speeding up some actions: ...
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Testing a MacBook Pro's RAM upgrade

What are the best possible RAM tests that can be run on a MacBook Pro (Early 2011 running Mountain Lion) after upgrading RAM from 4 GB to 16 GB? I see there a quite a few tools out there and the ...
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384 views

RAM upgrade options for a first generation 15" MacBook Pro

I am working on one of the first 15" Unibody MacBook Pro's (Late 2008 - MB470LL/A - MacBookPro5,1). According to EveryMac (and other sources), this machine really only supports 4GB of RAM. It looks ...
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What's the difference between real memory and CPU, and what are there effects on the performance of my computer?

In Activity Monitor, there are a couple fields: "PID", "Process Name", "User", "%CPU", "Threads", "Real Mem", and "Kind". I'm not familiar with the inner workings of computers and the related ...
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2k views

Can I upgrade my MacBook Pro using “generic” RAM?

Has anyone tried just buying generic RAM (which is 1/2 the price) such as the Kingston or Corsair brands? I figure if it works just as well as the $200 pairs, why not! I am open to other suggestions ...
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812 views

Why might more memory be wired in safe mode than in normal mode?

Maybe more noticeable in Lion and Mountain Lion, than in Snow Leopard and earlier versions of the operating system: in safe mode, an unexpectedly large amount of wired memory. Question Why ...
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1answer
474 views

Reduce memory usage in OS X Lion

I have a summer-2006 iMac with 2Gb memory. I use it mainly for "mainstream usage" : browse the web (including web-based applications such as Gmail) access a remote server (through screen sharing / ...
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3answers
3k views

Why does Finder use 59GB of swap space?

My new retina MacBook Pro(with 16GB RAM) keeps receiving this "Your Mac OS X startup disk has no more space available for application memory" message. I have 300 GB of free space on my hard drive, and ...
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2answers
675 views

Use different memory capacity RAMs in mac mini

I have a mac mini with 2GB RAM and want to buy another stick (since mac mini only have to memory slots) of 4GB (all other specs are the same), will it cause a problem? Thanks, Matt
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3answers
937 views

Putting in RAM with a higher speed

I wondering if I put my 1600Mhz 8Gig (4gigx2) modules in a Macbook Pro 17" 620m (2010 model) if the speeds would be automatically reduced to 1066Mhz? I'm just asking because I don't want to damage the ...
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2answers
243 views

Upgrading RAM on old MacBook

I need to upgrade the ram on an old macbook. It takes DDR2-667Mhz. Although those are quite expensive (guess they are not made anymore?). If I get higher MHz DDR2 memory will it still be compatible ...
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2k views

Why do Mac OS X ramdisks appear to be limited to 550mb and how can I change this?

All I can find on the Internet is a one line bash command to activate a ramdisk. It is only 550mb and I would like to be able to create on with more space? Is there a way to configure how big they can ...
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2answers
265 views

Is it necessary to disconnect the battery when installing new RAM in the early 2011 MacBook Pro?

I want to install additional RAM to my early 2011 MacBook Pro. I originally was only looking at the official Apple guide, but then while searching for a better screwdriver I found the iFixit guide, ...
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1answer
3k views

Does the “purge” command damage any thing in my system?

I am using OS X 10.5.8 and in spite of having 5GB of RAM memory, I face a lot of inactive RAM, and go to the terminal and purge it via the "purge" command (of course without quotes). I do this almost ...
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2answers
6k views

Does the new Macbook Pro with Retina display have user-upgradeable RAM?

I'm interested in purchasing the new MacBook Pro with Retina display, but it's not clear from the tech specs page whether the RAM is user-upgradeable or not. Do I need to take into account future RAM ...
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4answers
17k views

Can I use 1333 MHz RAM in a 1067 MHz MacBook Pro?

I've got a MacBook Pro from mid 2010 (6,2) and there is 2GB DDR3 RAM at 1067 MHz installed. I want to upgrade to 8GB but with 1333MHz as speed. Is this possible? Can my Mac support this kind of speed ...
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1k views

When will Finder use large amount of memory?

Sometimes I see the iMac with 4GB of RAM having a few MB of swap file only, and after I left for a few hours and come back, the swap file is 2.7GB. Looking into the Activities Monitor, the Finder is ...
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4k views

Can I use 16 GB RAM with my MacBook Pro 7,1?

I just picked up 16GB of RAM for my MacBook Pro, running the newest OS X. According to the NewEgg reviews, it should work in it. However, once I boot up, it shows the Apple logo and, after a few ...
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Why is it that my Mac would rather swap than clear inactive memory?

Why is it that my Mac (running 10.8 Mountain Lion) would rather swap than clear inactive memory? I know people say that the Mac OS manages itself and whatever, but there is a serious performance dip ...
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6answers
2k views

Replacing hard disk with SSD or increasing RAM in MacBook Pro

I am using MacBook Pro for the last 1.5 years. Here is my configuration. 13" MacBook Pro, min-2010 2.4 GHz Core 2 Duo 4 GB RAM OS X Lion 10.7.4 Would you recommend upgrading to SSD for fast ...
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74 views

Crashes and hangs after memory DOWNgrade

I recently lost one of my SO-DIMM memory modules on my 20" iMac (2.4GHZ Core 2 Duo alu), and now my iMac is back on 2GB memory from 4GB. Both were ValueSelect (DDR2 667MHz 200-pin) modules from ...
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4answers
375 views

Does the performance increases when the memory increases in Apple products?

I am planning to buy an iPad 3. My choices are, iPad 3 - 32GB with wifi iPad 3 - 16GB with wifi + 4G I'm so confused to select my best choice. Actually the problem is, some of my friends telling ...
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7k views

Why do Apple's latest MacBook Pros cap the RAM limit at 8GB?

According to apple's latest documentation (at the time of writing), the cap on the newest MacBook Pros is 8GB RAM. The Mac Pros, however, can take up to 32GB RAM. So, why do the MacBooks have this ...
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3answers
899 views

Memory usage on Mac OS, how Activity monitor works?

I have these stats, but is the system really using almost 4GB? This Inactive memory... Can't I use it? How should I interpret these stats?
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191 views

Sum of all processes' real memory not equal to used memory?

I wonder why the sum of all processes' real memory listed in Activity Monitor is not equal to (MUCH less than) the used memory?
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6k views

What are the differences between SDRAM and SO-DIMM RAM, and which should I use for my iMac?

I've started virtualizing Windows 7 on my Mac and I've realized 4GB of ram simply isn't enough for listening to music, surfing the web, virtualizing Windows, and running a compiler all at once. The ...
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Glitches in OS X - memory or ssd?

My laptop is Macbook pro 15', Early 2011, with an SSD drive - OCZ Agility 3 240GB. I changed my memory too to 16GB (Corsair from Amazon). I experience glitches: Also Skype refuses to launch. I ...
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146 views

Upgrading RAM of a MacBook

Is it possible to upgrade memory to 8 GB my model of MacBook? The manual says no, but on the web some people have made some videos about the upgrade. I don't know if any of them are fake.
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4answers
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Can I use Kingston RAM in a MacBook Pro?

I have MacBook Pro 15-inch, early-2011. I want to upgrade my RAM from 4 GB (2+2) to 6 GB (2+4). Can I use Kingston RAM (Kingston 4GB DDR3 1333 Bus SOD)? Or is there specific RAM made for Macs?
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4answers
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Will Early 2009 iMac accept faster-than-spec RAM?

I am looking to upgrade the RAM on my Early 2009 iMac from 4GB to 8GB. According to the memory specifications it accepts PC3-8500 204-pin SO-DIMMs. However, will the iMac accept faster RAM (e.g. ...
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1answer
2k views

Can I upgrade my MacBook with more than 4GB of RAM?

I have an Early 2008 13 inch MacBook updated to Lion. According to this Apple KB the max RAM I can add is 4GB. I know the OS that came with the initial computer didn't support 64 bit. So is this 4 ...
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3answers
3k views

Add more RAM to my MacBook Pro 5,3

I got my MacBook Pro on October 2009 , here are the specifications: Processor 2.66 GHz Intel Core 2 Duo Memory 4 GB 1067 Mhz DDR3 Lion 10.7.3 15-inch, Mid 2009 Model Identifier: ...
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2answers
2k views

Should I buy Ram memory DDR3 1066MHz for Mac mini (Mid 2011)?

I got a Mac mini last year and now I want to update the ram memory. I was looking for it and I just found this (spanish). The guy is selling what you see on the picture and I'm worried if I get those ...
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1answer
203 views

Reason for the need to reboot my iPad

this is my first question here so go easy on me. Truth to be told it's not really a question, more like a curiosity. I noticed that after prolonged use of my 1st generation iPad without rebooting it ...
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3answers
10k views

Maximum memory for 2011 iMac

I just bought an iMac and want to max out the memory on the machine. I have received two conflicting answers to my question so I'm bringing it to the community. Can I install 4 8GB memory chips for a ...
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2answers
652 views

How can I benchmark my new RAM?

Based on the responses to my earlier question about memory replacement, I plan to upgrade soon. That said, once I've acquired and installed said memory, what is the recommended Mac software I should ...
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5answers
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Is RAM upgrade worth it if I have an SSD already?

I recently purchased a Macbook Pro. I had an SSD from my last computer which I formatted, installed into my Mac, and used as my one and only HD (I don't need that much space so I didn't opt to do the ...
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3answers
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OS X Lion behaving oddly after upgrading to 16GB RAM

Just upgraded Early 2011 Macbook Pro w/ 4GB RAM to 16GB RAM. System now sometimes runs smoothly and other times pauses frequently. Terminal keeps giving me 'System is low on disk space/memory' ...
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How much RAM can I add to my macbook

I have a 2008 macbook with a 2.1 GHz Intel Core 2 Duo. I am in the process of upgrading to Lion. I currently have 2GB 667 MHz DDR2 SDRAM What's the maximum amount of RAM I can put in and it have an ...
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2answers
252 views

I'd like to upgrade my MacBook Pro's RAM and hard drive. What brands are reliable?

I do heavy web development/web design and run my software on a MacBook Pro (Mid 2009) 2.8ghz model. I use Adobe products, run virtual machines in Parallels, have multiple browsers open, text editors ...
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3answers
205 views

What do I need to look for when selecting new RAM for my MacbookPro8,1?

I'm looking at buying some extra RAM for my mid-2011 (?) MBP. OWC says that I can handle up to 16GB (2x8), though I might elect to go with "only" 8GB. I haven't bought computer components in a ...
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2answers
2k views

Can I put this RAM into my iMac 27" mid 2010? (Corsair CMSO8GX3M2A1333C9)

I have an aluminium iMac (from mid/late 2010 I believe). I want to upgrade the memory from 4gb to 8 or 16. I'm no hardware guy, but from the info I read it would appear I can upgrade to any SO-DIMM ...
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2k views

Way to limit how much RAM an arbitrary process can take up?

Lets say we have a OS X machine running with 4 GB of RAM. Is it possible to set it up so no single process can take up more than say, 3 GB, so no matter how memory hogging a process is, there's always ...