“No matter what I do, my Mac is still slow”, an average tech-consultant hears this phrase multiple times a day. Give a person even the most powerful computer, and pretty soon it will be cluttered with apps, extensions, and things that are too much for it to handle. To reverse it, one has to go back and сlean up the mess, removing memory agents one by one. Prepare for a fight — every byte of memory is at stake. So let’s put your Mac on a diet and get it more free RAM to breathe freely.

1. Mac Os Versions
2. Mac Os Catalina
3. Mac Os Mojave
4. Mac Os Download

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“Your system has run out of application memory”

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How do you know your Mac is low on memory? Floating “rainbow wheels” aside, you may notice your Mac now takes ages to load. You’ll also see many browser applications crashing. You’ll be also thrown warning messages as “Your system has run out of application memory”. To help it, you should first visit the Activity monitor to see memory usage on Mac.

How to check RAM usage on Mac

Go to Applications and type in Activity Monitor in the search bar. This invokes a good old Activity Monitor that should tell how much free memory you’ve got left.

A shortcut to open Activity Monitor:

Press F4 and start typing Activity Monitor in the search bar.

I’ve attached a screenshot from my Mac and as you can see my memory usage almost reached full capacity. Here’s what it all means:

App memory: taken by apps and processes
Wired memory: reserved by apps, can’t be freed up
Compressed: inactive, can be used by other apps
Swap used: memory used by macOS
Cached files: memory you can really use

Notice the colored graph under Memory Pressure. If your graph is all but red and yellow, your Mac is really gasping for fresh memory. It seems counter-intuitive, but “available memory” your Activity Monitor is not that important after all. In fact, it’s a system intended behavior to use all memory resources when available. On the contrary, the Memory Pressure graph is much more telling, so grow a habit to check this graph in the Activity Monitor every now and then.

How to check CPU usage on Mac

Open the CPU tab in Activity Monitor to keep in check CPU-heavy processes. Normally an app would be using 0-4% of CPU. If it takes abnormally more than that, go inside that particular item in the list and press the Quit button.

How to free up memory on Mac

Tip # 1. Remove Login Items to lower Mac memory usage

Login items are programs that load automatically upon Mac startup. Some of them covertly add themselves to the list and this is no good. If you’re looking to free up RAM, they are the first candidates for deletion. Don’t worry, you’re not deleting the app itself, you just stop it from auto-launching every time.

So, to remove Login Items and at the same time reduce your memory usage of your Mac, you need to:

1. Open System Preferences and select Users & Groups.
2. Click your nickname on the left.
3. Select the Login Items tab.
4. Check programs you don’t want to load as your Mac starts.
5. Press the “–” sign below.

Now, you won’t see these apps pop up the moment you turn on your Mac. Although this method doesn’t require some superpowers of yours, some special Mac optimization and memory cleaner tools may do the job faster and ensure the smooth performance of your Mac. CleanMyMac X is an excellent example of such software. Here’s how to disable Login Items with CleanMyMac X:

1. Download it for free and go to the Optimization tab.
2. Check Login Items to see the list of apps that get opened when you start your Mac.
3. Click Remove.

As you’ve already come to the Optimization module of CleanMyMac, you can also fix hung apps and heavy memory consumers there. In this way, you’ll free up the solid amount of RAM on Mac — 100% free of charge.

Tip # 2. Free up disk space if Mac is low on memory

The available space on your Mac’s drive translates into virtual memory. This comes to save you when you’ve run out of physical RAM. So now your computer relies on your hard drive space to keep your apps going.

The classic geek rule of thumb holds it that you should keep at least 20% of disk space on your startup drive. Not only this potentially reduces your future spending on iCloud storage but it also keeps your Mac speedier.

What to delete to free up space:

• Large unused files, like movies
• Old downloads
• Rarely used applications
• System junk

But here’s a simpler solution to save your time — clean up your drive with CleanMyMac X— the app I’ve mentioned above. Many users recommend it as an excellent way to free up more space because it searches for large & old files, useless system files, Photo junk, mail attachments and shows everything you can safely delete. Interestingly, it finds about 74 GB of junk on an average computer.

Extra trick: How to free up RAM on Mac with CleanMyMac X

If you have downloaded CleanMyMac, you may also take advantage of its amazing feature — the ability to free up RAM in a few seconds. Try this next time you see “Your system has run out of application memory” message.

1. Go to the Maintenance tab on the left.
2. Click Free Up RAM.
3. Click Run.

As simple as that!

And you can do it even if you download a free version of the app.

Tip # 3. Clean up your Desktop

This tip always comes at the bottom of instructions and unfairly so as it is quite effective. Without even looking at your Desktop I would assume it’s cluttered with mountains of icons. Thing is, your macOS was designed in a way that it treats every Desktop icon as a little active window. The more icons, the heavier memory usage on Mac. So in order to release available memory resources, it’s recommended to keep your Desktop clean.

You don’t have to do it all by yourself. With apps like Declutter and Spotless, every desktop cleaning session will be scheduled in advance and executed automatically. Your only job is to define the rules on how your files should be organized.

Tip #4. Clear cache files

Another way to free up RAM on Mac is to clear it of cache files. Of course, it won’t save you gigabytes of space, but deleting cache regularly, you can help your Mac run faster and avoid system issues.

So, to remove cache files on your Mac, you need to:

1. Open Finder.
2. From the Go menu, select Go to Folder.
3. Type ~/Library/Caches in the field and press Go.
4. In the window that appears, you will see all your cache files.
5. Press Command+A to select all files or delete files one by one.
6. Enter your user name and password to confirm.

If you find some files still in the folder after you emptied it, maybe you have some windows open on your Mac. Just like that, you can save up some space on your Mac. Don’t forget to empty the bin afterward.

Tip # 5. Tune up Chrome’s Task Manager

Although Google Chrome is not the one to blame for massive memory usage, it can indeed affect your Mac's performance. If you use Chrome as your primary browser, you probably have many windows opened there. Chrome runs a lot of processes to ensure a fast browsing experience for you. So, it uses your RAM for storing your tabs, plugins, and extensions. Look at how many entries Google Chrome has in Activity Monitor:

The question then arises, 'Why does Chrome use so much RAM?' The thing is that each process is responsible for a separate plugin or extension of your browser. For example, when a tab unexpectedly falls, you need to refresh it to continue your work there. If one process were responsible for all tabs and extensions, you would need to restart the whole browser instead. Can you imagine how many times would you do that? That’s the proper answer to why Chrome uses so much RAM.

I’ve been using Chrome for some years only to discover (recently) that Chrome had a task manager of its own. You can use it to force quit memory-heavy processes in the browser. It’s a handy tool because it lets you see how a page weighs on CPU usage on a Mac.

1. Go to Chrome settings (dotted icon in the top right corner)
2. Click More tools -> Task Manager
   

To free up even more RAM, close the GPU process. The GPU Process, though helpful in theory to accelerate pages, eats up a considerable amount of memory. Click to end it to free up RAM on your Mac.

Tip # 6. Manage RAM usage with CleanMyMac X menu

CleanMyMac X has another useful and convenient feature for managing your Mac’s performance and memory usage. As you install CleanMyMac X and start it for the first time, it’s icon will appear in your menu bar. Click the icon to open the CleanMyMac X menu. Here you can find updates on the current condition of your Mac and perform quick tweaks to increase your Mac's speed. Whenever you feel like your Mac underperforms, open the CleanMyMac X menu to check how much RAM is available and free it up as well.

Tip # 7. Close Finder windows

Okay, suppose you’re still asking yourself, how do I clear RAM on my MacBook Pro/MacBook Air. The next trick is as magical (you’ll see for yourself) as it is time-saving. It’s no secret that each window in the Finder eats up RAM. But how many open windows are there? Some of them are collapsed or stacked in some blind spot on your screen. This Finder command merges all your windows into one. See how to do it:

Click on Finder > Window > Merge All Windows

Now you can manage Finder windows more effectively and free up memory on MacBook.

What else you can do to minimize memory usage on Mac

I’ve saved the easiest tips for the end, as long as these ones are self-explanatory.

• Replace AdBlock (very memory-demanding) with a lighter extension
• Keep fewer opened tabs in the browser
• Restart your Mac more often to free up RAM
• Close all hung-up print queues

That was my take on how to make your Mac a bit speedier to use. If you’re looking for more guidance, check simple ways to speed up your Mac.

Frequently Asked Questions

How to check application memory on Mac?

To check RAM usage on your Mac, go to Activity Monitor (Applications > Utilities). In the Memory tab, you will see all the active processes that are using your Mac’s RAM. At the end of the window, there is a Memory Used graph, which indicates how much application memory is used.

How to find out whether your Mac needs more RAM?

Your Mac may be using almost all its RAM, but you don’t need more if it’s using it efficiently. Open Activity Monitor and go to the Memory tab. The Memory Pressure graph shows the current condition of your RAM: green color means your Mac’s using RAM effectively, while yellow is a sign that some application or process is using too much of application memory. The red memory pressure signals that your Mac needs more RAM.

How to quickly free up RAM on your MacBook?

To free up RAM on your Mac, firstly, you should find out what app uses so much of your memory. The memory-heavy programs are listed in Activity Monitor, Memory tab. If there is an app you aren’t using at the moment, click it and press the “X” sign to quit it. This will, in turn, free some of the application memory.

Memory-mapped file objects behave like both bytearray and likefile objects. You can use mmap objects in most placeswhere bytearray are expected; for example, you can use the remodule to search through a memory-mapped file. You can also change a singlebyte by doing obj[index]=97, or change a subsequence by assigning to aslice: obj[i1:i2]=b'...'. You can also read and write data starting atthe current file position, and seek() through the file to different positions.

A memory-mapped file is created by the mmap constructor, which isdifferent on Unix and on Windows. In either case you must provide a filedescriptor for a file opened for update. If you wish to map an existing Pythonfile object, use its fileno() method to obtain the correct value for thefileno parameter. Otherwise, you can open the file using theos.open() function, which returns a file descriptor directly (the filestill needs to be closed when done).

Note

If you want to create a memory-mapping for a writable, buffered file, youshould flush() the file first. This is necessary to ensurethat local modifications to the buffers are actually available to themapping.

For both the Unix and Windows versions of the constructor, access may bespecified as an optional keyword parameter. access accepts one of fourvalues: ACCESS_READ, ACCESS_WRITE, or ACCESS_COPY tospecify read-only, write-through or copy-on-write memory respectively, orACCESS_DEFAULT to defer to prot. access can be used on both Unixand Windows. If access is not specified, Windows mmap returns awrite-through mapping. The initial memory values for all three access typesare taken from the specified file. Assignment to an ACCESS_READmemory map raises a TypeError exception. Assignment to anACCESS_WRITE memory map affects both memory and the underlying file.Assignment to an ACCESS_COPY memory map affects memory but does notupdate the underlying file.

Changed in version 3.7: Added ACCESS_DEFAULT constant.

To map anonymous memory, -1 should be passed as the fileno along with the length.

class mmap.mmap(fileno, length, tagname=None, access=ACCESS_DEFAULT[, offset])¶

(Windows version) Maps length bytes from the file specified by thefile handle fileno, and creates a mmap object. If length is largerthan the current size of the file, the file is extended to contain lengthbytes. If length is 0, the maximum length of the map is the currentsize of the file, except that if the file is empty Windows raises anexception (you cannot create an empty mapping on Windows).

tagname, if specified and not None, is a string giving a tag name forthe mapping. Windows allows you to have many different mappings againstthe same file. If you specify the name of an existing tag, that tag isopened, otherwise a new tag of this name is created. If this parameter isomitted or None, the mapping is created without a name. Avoiding theuse of the tag parameter will assist in keeping your code portable betweenUnix and Windows.

offset may be specified as a non-negative integer offset. mmap referenceswill be relative to the offset from the beginning of the file. offsetdefaults to 0. offset must be a multiple of the ALLOCATIONGRANULARITY.

Raises an auditing eventmmap.__new__ with arguments fileno, length, access, offset.

class mmap.mmap(fileno, length, flags=MAP_SHARED, prot=PROT_WRITE PROT_READ, access=ACCESS_DEFAULT[, offset])

(Unix version) Maps length bytes from the file specified by the filedescriptor fileno, and returns a mmap object. If length is 0, themaximum length of the map will be the current size of the file whenmmap is called.

flags specifies the nature of the mapping. MAP_PRIVATE creates aprivate copy-on-write mapping, so changes to the contents of the mmapobject will be private to this process, and MAP_SHARED creates amapping that’s shared with all other processes mapping the same areas ofthe file. The default value is MAP_SHARED.

prot, if specified, gives the desired memory protection; the two mostuseful values are PROT_READ and PROT_WRITE, to specifythat the pages may be read or written. prot defaults toPROT_READPROT_WRITE.

access may be specified in lieu of flags and prot as an optionalkeyword parameter. It is an error to specify both flags, prot andaccess. See the description of access above for information on how touse this parameter.

offset may be specified as a non-negative integer offset. mmap referenceswill be relative to the offset from the beginning of the file. offsetdefaults to 0. offset must be a multiple of ALLOCATIONGRANULARITYwhich is equal to PAGESIZE on Unix systems.

To ensure validity of the created memory mapping the file specifiedby the descriptor fileno is internally automatically synchronizedwith physical backing store on Mac OS X and OpenVMS.

Mac Os Versions

This example shows a simple way of using mmap:

mmap can also be used as a context manager in a withstatement:

New in version 3.2: Context manager support.

The next example demonstrates how to create an anonymous map and exchangedata between the parent and child processes:

Raises an auditing eventmmap.__new__ with arguments fileno, length, access, offset.

Memory-mapped file objects support the following methods:

close()¶

Closes the mmap. Subsequent calls to other methods of the object willresult in a ValueError exception being raised. This will not closethe open file.

closed¶

True if the file is closed.

New in version 3.2.

find(sub[, start[, end]])¶

Returns the lowest index in the object where the subsequence sub isfound, such that sub is contained in the range [start, end].Optional arguments start and end are interpreted as in slice notation.Returns -1 on failure.

Changed in version 3.5: Writable bytes-like object is now accepted.

flush([offset[, size]])¶

Flushes changes made to the in-memory copy of a file back to disk. Withoutuse of this call there is no guarantee that changes are written back beforethe object is destroyed. If offset and size are specified, onlychanges to the given range of bytes will be flushed to disk; otherwise, thewhole extent of the mapping is flushed. offset must be a multiple of thePAGESIZE or ALLOCATIONGRANULARITY.

None is returned to indicate success. An exception is raised when thecall failed.

Changed in version 3.8: Previously, a nonzero value was returned on success; zero was returnedon error under Windows. A zero value was returned on success; anexception was raised on error under Unix.

madvise(option[, start[, length]])¶

Send advice option to the kernel about the memory region beginning atstart and extending length bytes. option must be one of theMADV_* constants available on the system. Ifstart and length are omitted, the entire mapping is spanned. Onsome systems (including Linux), start must be a multiple of thePAGESIZE.

Availability: Systems with the madvise() system call.

move(dest, src, count)¶

Copy the count bytes starting at offset src to the destination indexdest. If the mmap was created with ACCESS_READ, then calls tomove will raise a TypeError exception.

read([n])¶

Return a bytes containing up to n bytes starting from thecurrent file position. If the argument is omitted, None or negative,return all bytes from the current file position to the end of themapping. The file position is updated to point after the bytes that werereturned.

Changed in version 3.3: Argument can be omitted or None.

read_byte()¶

Returns a byte at the current file position as an integer, and advancesthe file position by 1.

readline()¶

Returns a single line, starting at the current file position and up to thenext newline. The file position is updated to point after the bytes that werereturned.

resize(newsize)¶

Resizes the map and the underlying file, if any. If the mmap was createdwith ACCESS_READ or ACCESS_COPY, resizing the map willraise a TypeError exception.

rfind(sub[, start[, end]])¶

Returns the highest index in the object where the subsequence sub isfound, such that sub is contained in the range [start, end].Optional arguments start and end are interpreted as in slice notation.Returns -1 on failure.

Changed in version 3.5: Writable bytes-like object is now accepted.

seek(pos[, whence])¶

Set the file’s current position. whence argument is optional anddefaults to os.SEEK_SET or 0 (absolute file positioning); othervalues are os.SEEK_CUR or 1 (seek relative to the currentposition) and os.SEEK_END or 2 (seek relative to the file’s end).

size()¶

Return the length of the file, which can be larger than the size of thememory-mapped area.

tell()¶

Returns the current position of the file pointer.

write(bytes)¶

Write the bytes in bytes into memory at the current position of thefile pointer and return the number of bytes written (never less thanlen(bytes), since if the write fails, a ValueError will beraised). The file position is updated to point after the bytes thatwere written. If the mmap was created with ACCESS_READ, thenwriting to it will raise a TypeError exception.

Changed in version 3.5: Writable bytes-like object is now accepted.

Changed in version 3.6: The number of bytes written is now returned.

write_byte(byte)¶

Write the integer byte into memory at the currentposition of the file pointer; the file position is advanced by 1. Ifthe mmap was created with ACCESS_READ, then writing to it willraise a TypeError exception.

MADV_* Constants¶

Mac Os Catalina

mmap.MADV_NORMAL¶

mmap.MADV_RANDOM¶

mmap.MADV_SEQUENTIAL¶

mmap.MADV_WILLNEED¶

mmap.MADV_DONTNEED¶

mmap.MADV_REMOVE¶

mmap.MADV_DONTFORK¶

mmap.MADV_DOFORK¶

mmap.MADV_HWPOISON¶

mmap.MADV_MERGEABLE¶

mmap.MADV_UNMERGEABLE¶

mmap.MADV_SOFT_OFFLINE¶

mmap.MADV_HUGEPAGE¶

mmap.MADV_NOHUGEPAGE¶

mmap.MADV_DONTDUMP¶

mmap.MADV_DODUMP¶

mmap.MADV_FREE¶

mmap.MADV_NOSYNC¶

mmap.MADV_AUTOSYNC¶

mmap.MADV_NOCORE¶

mmap.MADV_CORE¶

Mac Os Mojave

mmap.MADV_PROTECT¶

These options can be passed to mmap.madvise(). Not every option willbe present on every system.

Mac Os Download

Availability: Systems with the madvise() system call.