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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Macbook Air 2012 memory upgrade

I've won a 4gb RAM Macbook Air yesterday. I know that the RAM is soldered to the motherboard, so therefore non user upgradeable. I was wondering whether my nearest Apple Store could perform an ...
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New Corsair ram beeping on late 2008 MacBook

I purchased Corsair RAM memory (2x4GB) CMSA8GX3M2A1066C7 from Amazon.com. According to the description it "Works with any Mac computer that supports 4GB DDR3 SODIMMs". My MacBook supports 6GB ...
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1answer
659 views

RAM upgrade – iMac Mid 2011

I’ve got an iMac Mid 2011 with 4GB RAM preinstalled (2 x 2GB) and want to upgrade to 12GB. Is it ok to add a single 8GB RAM or is it better to add 2 x 4GB?
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232 views

How do I monitor the total physical and virtual memory usage of a process and all of its descendants?

From the command line, how would I get the total physical and virtual memory usage of a process and all of its descendants (not just 1st-level children)? This is useful when you want to monitor the ...
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4answers
249 views

Complete Specs for Mid-2010 iMac & Early-2011 MacBook Pro?

OK, so here I am. I've searched anywhere I could but definitely couldn't find what I was looking for. I'm thinking of performing some sort of upgrade (e.g. SSD or memory or CPU) and I'm trying to ...
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1answer
133 views

Productive use for old SO-DIMMs?

Being the local geek, friends and family turn to me for upgrading RAM in their computers. They provide the new sticks and I keep the old ones. As such, I have accumulated quite the collection of DDR3 ...
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1answer
119 views

Macbook Pro unresponsive while opening applications

I have had an 240gb Corsair SSD in my 2.53 GHz Intel Core i5 Macbook Pro (OSX 10.6.8) for about 8 months. The computer has 8gb RAM. It has been great for most of that time, but in the last month or ...
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1answer
380 views

What are the consequences of using DDR3 RAM in DDR2 MBP4.2?

I'm supposed to use DDR2 5300 (667MHz) RAM for my MacBookPro 4,2. The max is 6GB, and I already have 4GB (2 x 2GB), so I only need a single stick of 4GB. So far it looks like this spec RAM runs about ...
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1answer
245 views

MacBook Pro has to recover from Safe Sleep after 50% of all sleeps, although power is connected

When I wake my MacBook Pro from sleep it sometimes has to recover from Safe Sleep, even though the power is connected. I have installed 16 GB (2x8) RAM myself on my MacBook, however 8 GB is the max ...
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1answer
199 views

Mac has enough memory, but still pages in, is that a problem?

I recently upgraded my memory, but I notice that while the OS does NOT page out at all (from what I see in Activity Monitor), the machine pages in regardless. Why does that happen? Is that a problem? ...
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1answer
343 views

Memory for iMac12.1 (mid-2011)

I've found here that imac12.1 (mid-2011) unofficially will support 32 GB of RAM. Questions: Can I mix 2x2 GB with 2x8 GB of memory to get 20 GB of RAM? Will this model work with imac12.1? Thank ...
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1answer
510 views

Will this RAM work for me? (Late 2009 iMac)

I have a 27-inch iMac late 2009 desktop computer and i'm looking to upgrade my ram. The best RAM I can find is a Kingston 2GB, DDR3-1066, PC3-8500, CL7, DIMM. What I currently have is 4GB 1067 MHz ...
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2answers
3k views

Can a RAM module not be compatible with Macs?

There are DDR3 RAM modules sold on Amazon (branded by KomputerBay) where it is specified that they are "PC only" and not for Mac. They cost around £41.99 ($68). The same company has modules with the ...
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1answer
4k views

Reliability of cheaper RAM like Komputerbay, or unbranded?

Online stores sell DDR3 memory from companies like Komputerbay for a fraction of the price that Kingston, Samsung, Crucial, OWC, etc. charge (not mentioning Apple OEM). Most reviews are good, but ...
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2answers
1k views

iMac 2012 RAM upgrade with mixed voltages

Variation of already asked question: I now understand that I can add two matched 8 GB sticks of RAM into the two empty slots, even though the other two slots are filled with two 4 GB modules. But is ...
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1answer
1k views

Are all four SO-DIMM slots user-accessible in the 27 inch iMac (Late 2012)?

I'm going to buy a new 27" iMac, but I think that the RAM on the Apple Store is really too expensive. My plan is to buy with minimum (2x4GB) RAM and replace everything with 4x8GB. Are all 4 slots ...
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2answers
3k views

2012 iMac RAM Upgrade

I've just ordered the 27" iMac, which has user-upgradable RAM slots. There are four slots, and the default configuration that ships is two 4GB modules, and two empty spaces. Can I fill the other two ...
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1answer
206 views

Is the macbook retina's soldered RAM in any way faster than typical RAM?

You would think it would make some kind of difference...
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7k views

How important is the 16gb ram upgrade on 15" retina macbook pro? [closed]

So I am on the market for a new workhorse laptop that will be my main computer. My use for it will be mostly web design/python programming, and would like to check out the latest games. I was ...
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2answers
7k views

Using memory with a higher MHz rating? [duplicate]

Can MacBook Pro's successfully support and fully exploit RAM of a higher MHz rating than that which they ship with? For example, take my 15" MacBook Pro (Late 2011) that ships with 4GB of 1333MHz ...
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3answers
3k views

MacBook Air RAM Usage [duplicate]

Possible Duplicate: Trouble Understanding Inactive Memory in MacOSX I'm just wondering why does the Activity Monitor or Free Memory app says that I have 867 MB free (while writing this ...
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0answers
938 views

Close down all background iPhone apps without clearing task switcher (Jailbreak)

I have a 3GS running 5.1. Memory management is key to keeping it running smoothly. I've tried: SBSettings processes. Clears apps one by one and clears memory - and leaves them in the task switcher. ...
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1answer
1k views

Do I need to do anything after upgrading my RAM?

I just replaced a 1GB RAM stick in my 2007-era Macbook Pro with a 2GB RAM stick. It already had Mountain Lion installed on it. Is there anything I need to do like configuring something in System ...
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0answers
106 views

memory bandwidth for 13.3 macbook pro early 2011?

I have a 13.3 MacbookPro early 2011. Stock memory is 2GB x 2 PC3-10600 DDR3 1333 MHz. Now I want to upgrade RAM as 4GB x 2. Can i buy a memory which is PC3-10666 1333MHz, or do i have to buy ...
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1answer
136 views

Using Ram pulled from new iMac in an old iMac?

My parents have an iMac circa 2007. Documentation says that this model should use this type of RAM: Memory: DDR2 PC2-5300 Memory Type: DDR2 PC2-5300, DDR2 (non-ECC) Maximum Memory: 4GB I've got a ...
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3answers
6k views

How does memory management work in Mac OS X?

I am a university student who has been trying to write a compare and contrast paper between how Windows, Linux, and Mac OS X manage memory. For instance, with Windows, it's physical memory (RAM) and ...
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3answers
3k views

Why is Java using so Much Real Memory?

Java is consistently listed as using 700MB of real memory. That is a nice chunk of change on my 4GB iMac. I don't even know that I am running a Java Application, ever. Any ideas?
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281 views

Available RAM less than what my Macbook is supposed to have

When I go into Photoshop and then I look at performance in the preferences, it says that I have "3240 MB Available", whereas I have a 4gb RAM MacBook Pro. Also, it often crashes, and I frequently have ...
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298 views

iPhone 4 with 6.4GB of free storage asks to change storage settings

My one week old iPhone 4 warns me to change my settings in storage when I go to add my music. I have no music, videos, pictures,... stored on my iPhone. The only thing I've got, are 4 simple apps. Is ...
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0answers
85 views

iOS Memory Mangement Technique

I was wondering what kind of technique does iOS use? Single contiguous allocation Partitioned allocation Paged memory mangement Segmented memory mangement I believe it is partitioned allocation, but ...
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1answer
10k views

How to identify CPU and memory usage per process on iPhone?

There are many common apps available to show total system RAM usage and free. However, my understanding is only a jailbroken phone has access to the APIs to access PER PROCESS memory usage on iOS. ...
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4answers
12k views

MacBook Pro RAM upgrade is causing beeping sound?

I just upgraded the RAM in my MacBook Pro (15" 2 GHz Intel Core i7 - early 2011 model) from two 2gb modules to two 4gb modules. Started up just fine and ran great for about 10 minutes. Then the screen ...
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346 views

MacBook 5,1 (unibody) getting kernel panics if memory bank 0 is populated

Any configuration of ram that uses bank 0 on my MacBook causes a kernel panic after about an hour of use. The slot looks fine: all the pins are there, and are straight (no visible bends or breaks) ...
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3answers
114 views

How does the hardware manage to save the current workspace state so efficiently?

Basically, how does the system save every state in the workspace (windows, desktops, open programs etc) when you do a restart ? Does that affect the efficiency of the software in the long run ? For ...
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2answers
4k views

Is it possible to insert a 8 GB RAM stick and a 2 GB RAM stick into a Mac?

I'm buying a Mac mini with 16 GB of RAM on board. The other Mac I have is a 4 GB MacBook Pro. I'm wondering if it would be possible to shuffle the memories between both of them, so I have a single 8 ...
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1answer
1k views

Mountain Lion System Freeze - Poor Memory Handling?

Useful details: Core2Duo mid 2010 Macbook Air, 128Gb SSD, 2Gb RAM. Since I upgraded to Mountain Lion I've had this occur a few times. I'll be running my system and it'll completely freeze, no ...
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Isn't Inactive memory a waste of resources?

I'm looking for explanation of memory usage on my machine especially in light of the example in this screenshot below: I understand what is Free and Active means But what are the meanings of Wired ...
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3answers
6k views

MacBook freezes with three beeps

My Feb-2011 MacBook Pro hangs with three beeps. I noted the first strange thing a few days ago. The MacBook was in standby (as always) but very hot (not usual). I thought some process must have ...
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55 views

Is there a way to monitor the stack of execution in order to find the longest hangs?

Related to this unsolved mystery: apple.stackexchange.com/questions/62416/why-do-i-get-serious-execution-lag-on-clicks-application-switching-and-general I'm wondering if there's a way to see which ...
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2answers
6k views

Why ever does Parallels 8 recommend max 4 GB RAM for a VM?

I'm a VMware Fusion user and am trying out Parallels since VMware has some quirks that are annoying on Mountain Lion on a retina MacBook Pro (16 GB RAM). I'm wondering about the baffling Parallels ...
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2answers
469 views

Recover in-memory Pages data from failed hibernation wakeup

My girlfriend's Macbook crashed while attempting to restore from a hibernated file. The progress bar stopped at ~10%, after which we restarted the computer for a normal startup. This hibernated ...
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1answer
2k views

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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111 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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1answer
1k 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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444 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
929 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
1k views

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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2answers
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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1answer
5k views

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 ...