Questions tagged [memory]

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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Installing RAM - 27 inch late 2013 iMac

My iMac is running slow and I am hoping to get a few more years out of it. I figure I have two options: add memory replace my current hard drive with one that is solid state. So I am tackling ...
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macOS 10.15.3 crashed when Unity3D 2019.3.1 is launched (Kernel Panic)

macOS 10.15.3 crashes when I launched the Unity3D editor. Kernel Panic I was on 10.15.1, I updated to see if the issue resolves but it didn't. Here is some attached log panic(cpu 0 caller ...
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Is it worth upgrading Macbook mid 2010 [closed]

I own a Macbook Pro Mid 2010 (Macbook 7,1) which has gone through several upgrades. Before any of the upgrades, the CPU fan was constantly noisy whenever running any application, making it impossible ...
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Mac doesn't show right information in Storage

For some reason my Mac doesn't show a space taken by iCloud. I have 0.8 of 5.0 gb available on it, but it doesn't show a blue section. I used to have it. What can I do to return it?
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Command line program to show contents of memory location?

I want to inspect memory. In Linux I can probably just browse through /dev/mem, but how to view system memory at a specific location on the Mac though?
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iMac 21.5" Mid 2011 - Stuck on white screen at boot

The problem is that the iMac displays the Apple logo then flashes black before getting stuck on white screen. What I've tried so far: Safe Mode (⇧) - not working, can´t get into Safe Mode, loading ...
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MacBook says out of space but disk inventory and daisy disk show plenty of space please please help [duplicate]

I have a mid 2011 MacBook air with 128 gb but from every app it says im only using 98 gb while the system has 76.45 gb that its taking that I cannot locate anywhere. I have tried everything I can ...
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Apps suddenly quitting or freezing? Memory problem?

I have a MacBook Pro (2018, 13-inch) with Catalina. Every once in a while, my mac gets weird. All the tabs open on Chrome go black and if I try to reload, the whole app usually just quits. Other apps ...
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54 views

Can I increase RAM from 8GB to 16GB on this model?

I have this Macbook Pro with the following specs: anyone know if it's possible to switch out the RAM for an upgrade to 16GB?
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How to create a read-only shadow for existing RAM disk on macOS?

Read-only RAM disk can be created with method described in this post, so how to create a read-only shadow mount point for existing RAM disk while keeping the original mount point unchanged with ...
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Mac mini 2018 cursor freezes after RAM upgrade

My Mac mini 2018 (3 GHz Core i5) runs Mojave 10.14.6. Monitor is an LG UHD 27UK850. After a RAM upgrade to 32GB the cursor regularly but momentarily freezes approximately every 4 seconds - a major ...
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1answer
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Mac Pro 2020 upgradability - DDR5, ARM, Neural Engine?

Can the Mac Pro 2020 in the future be upgraded to replace/add these: DDR4 -> DDR5 Intel -> Arm ... -> Apple Neural Engine Or are they not compatible with the current Mac Pro design? They are all ...
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How to create a read-only RAM disk on macOS from the command line?

On macOS Catalina, a RAM disk with 512MB space can be created with the following command: diskutil eraseVolume HFS+ "RAMDisk" `hdiutil attach -nomount ram://1048576` On Ubuntu, a RAM disk and its ...
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MacPro 5,1 1333 MHz RAM Spec

I have a question concerning the memory spec for my Mac Pro. This Mac is originally a Mac Pro 4,1 with flashed firmware to Model 5,1. The CPUs are 2x Intel x5690. Now I would like to upgrade the ...
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Continually getting “you do not have enough application memory” despite plenty free [duplicate]

A few times recently my MacMini running 10.14.6 gets into a loop of giving this error every few minutes to seconds. This is despite having 1.5-3GB application memory free, according to the Memory ...
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How to hunt down which tab or webpage (on Google Chrome) used a lot of memory?

I already know Google Chrome was using a lot of memory for a badly behaving webpage. The issue was I don't know which webpage was doing that. Sometimes after a day or two, possibly some webpage on ...
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1answer
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How large is my 2012 MacBook Air's L1 cache? Are they larger now?

Discussion in comments below this answer to improving speed of this numpy-based diffraction calculator suggest that the reason the script in the answer runs slow for me but fast for others (even on ...
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Removing iCloud Drive memory usage

I've been searching on and off for quite awhile to find where iCloud Drive is using up 4 GB of my storage. I seldom use iCloud and do not have many things in my in Files folder. How can I delete this ...
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1answer
826 views

High memory usage on MacOS Catalina

I noticed that most of the time, Activity Monitor tells me that memory used is above 10 Gb (out of 16). But the processes listed doesn't seem to consume as much memory. Here are screenshots : I also ...
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64GB MacBook Pro using Swap space

Any idea why my computer is using swap?
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iMac RAM expansion compatibility

I have an Apple iMac (Retina 5K, 27-inch, 2017) with 8GB RAM and I would like to expand the memory to 16 GB. I have found the following ram on line (Newegg)and I would like to know if is it compatible ...
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109 views

MacBook Air keeps crashing due to memory problem

After I installed the new macOS Catalina update, every time I finish working on a project on Eclipse, my Macbook Air crashes. The message I get after it restarts is that it is a memory problem. If I ...
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1answer
120 views

macOS wastes RAM on Mac with 64Gb RAM

Last week I've switched from my old Macbook 15" 2014 16Gb to Macbook 16" 64Gb. With my old mac I was quite comfortable to run Chrome, Lightroom, VSCode and even VM at the same time. A 2-day fresh Mac ...
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1answer
219 views

Mac swift process blocks system, high memory pressure

Recently, since XCode 11, my Mac starts a process (it seems like it does so when indexing or building files) called swift and my Mac soon starts to lag. This process gathers a lot of memory (sometimes ...
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Is there a command line program or script to monitor VRAM usage?

I have a mid-2014 MacBook Pro [2.8 Ghz i7 (4980HQ Haswell/Crystalwell), NVIDIA GEForce GT 750M (2040 MB VRAM)], running 10.13.6, connected to a Dell P2715Q 27" 4K external monitor. Since the last ...
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1answer
55 views

Is there some way to specify memory limits on specific apps in MacOS?

I bought a 32GB MacBook Pro because I teach a software boot camp and need to run several memory intensive apps (video conferencing, ide, chat, browser w/ many tabs, etc...) and my 8GB MBA couldn't ...
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167 views

When will we have LPDDR4x memory in MBs/MBPs?

Apple just announced their much expected 16" MBP, which still features DDR4 memory in order to be able to support more than 16GB RAM. I find that a bit disappointing, and am a bit puzzled as to why we ...
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Command to release the best amount of Kernel Task and Memory Ram

I have an old MacBook Pro 2012/2013 and it has the El Capitan Through the Utilities -> Activity Monitor tool I can get the following stats according the following behavior: For example if the Mac ...
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softwaredownloadd consuming insane amounts of RAM

When I went into Activity Monitor, I noticed that a process called storedownloadd was consuming 2.7GB of RAM and increasing RAM usage steadily (3.1GB during screenshot). However, it was not consuming ...
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730 views

Catalina upgrade leads to permanent “system has run out of application memory”

After upgrading to Catalina I get a permanent error message stating "Your system has run out of application memory" which appears in a dialog that obscures my active windows. This appears when I ...
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28 views

Why is the RAM usage of my system smaller on startup than it is after using (and closing) software?

When I start up my mac the ram usage is about 4 gig. I will open up a few programs like photoshop and indesign which use a lot of ram and then shut them down again to try to reclaim that ram when i ...
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2k views

RAM stress test

I'm spec-ing a new MacBook Pro and want to know how much memory my workload requires. I'm doing my development work on a 2011 iMac with 16GB of RAM and want to know if I need that much memory for my ...
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Macbook sudden black screen & Shutdown

My MacBook pro retina 15" Late 2013 8 gb RAM MacBookPro11,2 A1398 (EMC 2674 ) was shutting down by itself, and when I ran the command in terminal the log it says, kernel: (AppleSMC) Previous ...
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Any good memory test for newer Macs (2015 and later) [closed]

I'd like to be able to test memory thoroughly in Macs (2015 and later, for older Macs I use Apple ASD tests). I tried Memtest but it won't boot from a thumbdrive for some reason.
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How to find the speed and CL settings of DDR3 SODIMM?

I bought a pair of Crucial 8GB DDR3 1866MHz SODIMM for my iMac 27 5K Retina Late 2015. I suspect the SODIMM that I received is 1600MHz, potentially counterfeit. Here is my question Is there any ...
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Is this ram compatible with iMac 27"?

I’m looking to upgrade my iMac’s ram but don’t really know much about what’s compatible and what’s not. Is a ram with following features compatible with it? Crucial 16GB DDR4 2400Mhz SODIMM CL17 DRx8 ...
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iMac 4k 2017 3ghz - RAM upgrade experience (32G)

I have 4k (21,5") iMac 2017 with 3Ghz CPU. Already using thunderbolt external nvme ssd and now it is time to upgrade the RAM. (Yep, I know what needs to be done, no need to warn me.) I would like to ...
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4k views

Can I upgrade the memory in a MacBook Pro 2019?

my Mac is a MacBook Pro 2019 I do not have any information about Mac or cp. I am using R and I am running a heavy model, but I can not get a result because of lack of memory. Is there any way to fix ...
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Problem with copying files above ~4.2 GB [duplicate]

I am trying to copy video (mp4) files from the solid state drive of my MacBook Pro to both a external hard disk as well as to a SanDisk USB thumb drive. It goes well up to abut 4.1 GB file size, but ...
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Saved images from Photoshop do not show up in folders until restart

I have a problem saving images from Photoshop CC. I usually shoot Camera Raw images, edit them and save them as JPEGs. Photoshop seems to save images normally - it takes about 2 seconds to complete ...
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2answers
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RAM upgrade for an iMac 27" 2017 used for video-editing, compression and audio recording

I have a 27" iMac (2017) - 4.2 GHz Intel Core i7 - Radeon Pro 580 8 GB - 16GB DDR4 running macOS Mojave 10.14.6. I do a lot of video editing, compression and record a lot of Live DJ Sets with a Pro ...
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This webpage is using significant memory: how to stop it appearing?

This webpage is using significant memory. Closing it may improve the responsiveness of your Mac. This banner appears at the top of some websites I use sometimes. If I close it, it reappears again ...
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4answers
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What are my hardware upgrade options for a late 2009 iMac?

It is now July 2019 and I have this Late-2009 iMac. macOS High Sierra Version 10.13.6 iMac (27-inch, Late 2009) Processor: 3.06 GHz Intel Core 2 Duo Memory: 4 GB 1067 MHz DDR3 Graphics: ATI Radeon HD ...
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1answer
1k views

Is there a difference between PC4-21333 and PC4-21000 RAM for iMac 5K 27' 2019

I am trying to upgrade my iMac 2019 5K 27' to 64GB. Per Apple specs, the RAM should be PC4-21333, but the only one I seem to be able to find on Amazon or macsales.com seems to be PC4-21000. Is there ...
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How to know how much CPU and RAM I need for new computer?

I got a pimped up macbook pro (i7 3.3GHz i7) from late 2016 atm, but I feel like I could use a less powerful machine. I would like to find out what's my current/peak average CPU and RAM usage to see ...
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Unexpected limitations on “Updates” folder?

Apple sent me 4GB of updates to go to macos 10.14.5 this morning. As I have several systems needing this update, I thought I would try to save the contents of the /Library/Updates folder to use rather ...
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2010 Polycarbonate (White) MacBook: Has anyone tested to run with 2x1600MHz DDR3 16GB memory?

I am looking to add more RAM to my 2010 Polycarbonate unibody MacBook. It has Core 2 Duo with Nvidia 320M chipset. I've read that this model can run 16GB RAM (even though Apple states otherwise), and ...
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535 views

iMac 2019: Can I mix the old modules with the new ones when upgrading RAM?

I've found a similar question but it's about the 2016 iMac, so I want to double check for the current (2019) model. Can I mix new RAM (Crucial CT2K16G4SFD8266) with Apple's stock RAM? I am planning ...
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198 views

MacBook Pro equipped with 16 GB RAM, never uses more than 8 GB

I have an early 2015 MacBook Pro equipped with 16 GB RAM. The computer however appears to be never using more than 8 GB. This is a screenshot of htop with the computer under heavy load (Large postgres ...
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RAM Upgrade for Mid-2010 MacBook

So I have a Mid-2010 MacBook and I tried to upgrade the RAM. I put in 2 4GB sticks and it started to beep. I took out one, and it still beeped. When I put in one of the original 1GB sticks and a 4GB ...

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