Questions tagged [macos]

macOS is the current marketing name for Apple's Macintosh Operating System. This OS was previously known as OS X, and Mac OS X before that (which itself succeeded the 'classic' Mac OS).

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113
votes
19answers
92k views

How can I figure out what's slowly eating my HD space?

Every few days I get notices on my MacBook that it's running or run out of hard drive space. Curiously, restarting the computer will enable me to recover gigabytes of space (this past time, it was ...
49
votes
4answers
81k views

How can I download an older version of OS X/macOS?

Sometimes it's hard to search for older versions of macOS & OS X on the App Store. This is an attempt to provide the canonical QA for this issue, as per the Meta QA - Where is the list of ...
179
votes
6answers
402k views

How do I disable System Integrity Protection (SIP) AKA “rootless” on macOs [OS X]

Apple has introduced System Integrity Protection, also known as "rootless", with OS X 10.11, El Capitan. I understand this is a step for general protection against malware but as a developer I need ...
131
votes
10answers
133k views

OS X computer name not matching what shows on terminal

My computer name in System Preferences > Sharing is set to "archos", but is showing as "iphone" on Terminal. It just started doing this after I loaded Xcode for doing iPhone ...
68
votes
4answers
441k views

I don't have administrator account on my mac

On my mac I have 2 accounts and the both are normal account. So in this moment I don't have a Administrator account, only one that was in the past a administrator, but now is not. How I can have ...
18
votes
7answers
44k views

How can I get back a system file after deleting it from my Mac?

I've deleted a system file from my Mac and need to get it back. System files can include: hidden files in the root of / - especially unix files in /private /System files /Library files /...
251
votes
3answers
167k views

What is the “rootless” feature in El Capitan, really?

I have just learned about the "Rootless" feature in El Capitan, and I am hearing things like "There is no root user", "Nothing can modify /System" and "The world will end because we can't get root". ...
10
votes
1answer
9k views

OS volume shows as type 'FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF' [duplicate]

Yesterday, I have tried to delete an Ubuntu partition. Since, my Mac (13", MBPro mid-2014) doesn't boot. Now, I boot on Mac OS copy with an USB. i follow different subject of this forum (like this : ...
42
votes
2answers
399k views

How can I get admin access to a Mac without knowing the current password?

My Father died last year and I inherited his Mac Mini. My wife has retired and we are trying to set up the mini for her use but the changes we want to make require admin access and we do not have the ...
69
votes
4answers
74k views

How do I remap a key in macOS Sierra, e.g., Right Alt to Right Control?

I used to use Karabiner to remap Right Alt to Right Control (as an Emacs user I use Control MUCH more that Alt) but updating to Sierra broke this. Downgrading is not an option. How do I manually ...
57
votes
11answers
151k views

Is it possible to use Boot Camp with Windows 10 from an external HDD?

I need to run Visual Studio on my MacBook Pro and I need Windows to do that. The easiest and well known way to install Windows on a Mac is by running the Boot Camp app on the Mac and let it do what's ...
39
votes
8answers
67k views

Resizing or expanding a CoreStorage volume

I bought a new SSD with 750 GB and made two partitions: 600 GB and 150 GB. The smaller one was thought to be a Bootcamp partition one day, but to date it was just another unused partition. When I ...
91
votes
7answers
49k views

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 ...
59
votes
7answers
49k views

How do I write to NTFS drives in OS X?

What is the best, easiest, preferably cheapest way to make OS X write to NTFS-formatted drives in Mac OS X?
29
votes
6answers
53k views

Are OS X shutdown cause and sleep cause numbers listed/explained anywhere?

The numbers in which I'm most interested -2 0 3 5 … I might add to that shortlist. What do those numbers mean; where might we find authoritative explanations? Somewhere in Apple open source, ...
360
votes
11answers
358k views

Shortcut for toggling between different windows of same app?

I opened two Google Chrome windows (because I am using multiple Gmails) and when I do the Cmd ⌘ Tab ⇥ shortcut it just shows me other applications that I opened but does not show me the other Chrome ...
55
votes
10answers
25k views

Can I create a shortcut to open a specific application on OS X?

I want to create a keyboard shortcut to i.e. open Firefox while I am working in another application. I know I can use ⌘ CMD+T when I am in Firefox to open a new tab. I haven't found a way to create ...
8
votes
1answer
3k views

What is an efficient way for developers / power users to use OSX window management and Spaces on a single screen?

This may be a strange question. Background: I usually work in a multiple monitor setup, where I can plaster the screen with all my windows so nothing I might need to switch to is ever hidden from ...
73
votes
5answers
34k views

On OS X, what files are excluded by rule from a Time Machine backup?

In addition to whatever files I may choose to exclude, what files does the system exclude by rule or classification? It might make sense not to backup Trash or Caches, but I'm looking for a way to ...
74
votes
6answers
21k views

How to add characters to the press and hold character picker in OS X Lion?

In OS X Lion, there is a very useful feature for people like me who need to write in multiple languages, which pops up a small menu of additional characters when you hold down a letter. For instance, ...
5
votes
2answers
2k views

Revert to El Capitan

I'm having major 'disagreements' with Sierra, compatibility issues with software etc, & have decided to revert to El Capitan. I have done this many times in the past, tested an OS then gone back ...
246
votes
8answers
712k views

How can I manually delete old backups to free space for Time Machine?

I use a Time Capsule for backup and now I want the drive to back up data from an extra Mac. But the drive is filled up with old backups from Mac 1. There simply is not enough space available for the ...
308
votes
5answers
106k views

How can I disable animation when switching desktops in Lion?

I would very much like to disable the sliding animation that occurs when switching desktops via ctrl+→/← or ctrl+[number] in Lion. This was previously accomplished in previous versions ...
111
votes
3answers
252k views

Creating A Bootable USB Of Windows 8.1 On OS X?

Reasons for wanting create such a usb include: PC is unbootable and you want to prepare a bootable USB using the ISO file that you have on your external hard drive. to install Windows 8.1 on Mac ...
180
votes
26answers
59k views

Is there a quick way to lock my Mac?

On Windows you can hit the keys Windows+L to lock your computer if you step away. I don't want to have to remember if sleep currently asks for a password, if there is a time out where my screen isn't ...
42
votes
5answers
38k views

How can I run/stop/relaunch an application automatically, at boot/login/some other time?

How do you make a script or app to run or stop running automatically when the system is booted, a user logs on, at a specific time, when a disk is attached, etc.?
23
votes
6answers
24k views

Constant kernel GPU panics (GPUPanic.cpp:127) on mid-2010 MacBook Pro (6,2)

Hardware is a mid 2010 MAcBook Pro 15", i7 2,66ghz, 8 GB RAM, 512 MB Video RAM. I encounter regular kernel panics for a while now, I think since upgrading to Mavericks. Usually it used to happen ...
7
votes
2answers
81k views

Can Recovery Mode install OS X onto a blank SSD?

I want to install a new Solid State Drive (SSD) into the Mac. Can I just build in the SSD, start the MacBook in Recovery Mode and install OS X from there on? After reading a lot on the internet I ...
13
votes
3answers
13k views

What is a Kernel Panic and what does it mean?

I have this report: Anonymous UUID: Removed Tue Aug 11 20:26:13 2015 *** Panic Report *** panic(cpu 2 caller 0xffffff8028bc1cde): "launchd died\nState at Last Exception:\n\n"@/SourceCache/xnu/...
55
votes
5answers
233k views

MacBook Pro: How to disable discrete GPU permanently from EFI?

I'd like to disable the NVidia GTX 750M GPU on my MacBook Pro 15" (Retina, Mid 2014, Mac OS X 10.10 Yosemite). I know I can use GfxCardStatus but I read I could have a more permanent solution by ...
72
votes
7answers
88k views

Is there any way to set a MacBook Pro to not sleep when you close the lid?

The most common use case I have for this is when I'm playing music over AirTunes, but don't want an open laptop laying around. Or when I'm syncing or downloading something. This isn't the same as ...
23
votes
3answers
35k views

How do you get system diagnostic files from macOS?

I am trying to debug a crashed (or hanging) app. How do I get the diagnostic files from the crash?
22
votes
2answers
6k views

Data Not Backed Up, Partition Type: FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF

I was trying to install Linux on my MacBook for class when I bricked my computer, which now in an unbootable state. I made my partition too small, so I was going to delete and create a larger one. ...
44
votes
9answers
78k views

How can I create or recreate a Lion recovery partition?

For whatever reason, one of our macs didn't make a recovery partition when it upgraded to Lion. Is it possible to add a recovery partition after the fact? To be clear - on a normal mac, the ...
50
votes
5answers
13k views

How do I remove duplicate “Open With” context menu items in Finder.app?

For whatever reason, the "Open With" context menu in Finder is always listing every app four times (exactly). I've read about (and tried) rebuilding the Launch Services database to restore the ...
20
votes
6answers
2k views

How do I change the location of macOS screen captures?

As a developer, I take a lot of screen captures. I often take screen shots to share with Stack Exchange members in chat. The problem is my Desktop is so cluttered with screen captures that they're ...
12
votes
5answers
7k views

How to keep an SSD in shape on Yosemite?

As of OS X 10.10, Apple uses kext signing. Ever since it has become difficult and dangerous to manually activate TRIM for third-party SSDs on OS X. That means users with non-Apple SSDs will sooner or ...
584
votes
155answers
331k views

Please share your hidden macOS features or tips and tricks

Do you know any hidden or little-known nice feature of macOS (née Mac OS X)? It doesn't matter what it is—maybe just a short terminal command or a keyboard shortcut. Share your experiences on ...
391
votes
10answers
291k views

How to find cause of high kernel_task cpu usage?

Occasionally my machine will have a kernel_task instance max out the CPU: This can last from minutes to sometimes hours. The machine is effectively unusable in this state. Restarting doesn't help; a ...
332
votes
12answers
188k views

How can I trigger a Notification Center notification from an AppleScript or shell script?

I'd love to be able to take advantage of 10.8's Notification Center features in AppleScripts and shell scripts I write. Is there a built-in command or a third-party library I can use from either an ...
177
votes
12answers
231k views

Why are dot underscore ._ files created, and how can I avoid them?

I am using different operating systems on different machines on different locations. I am using a USB flash disk to keep my files (source codes etc.). I am new to Mac OS X and now I realize there are ...
96
votes
17answers
235k views

Why is the accountsd process eating so much CPU?

Why are the accountsd and securityd processes using so much CPU on OS X 10.10.3? I am on a Early 2011 Macbook Pro. What are these processes for? Is it safe to kill them? The machine has only been up ...
16
votes
1answer
7k views

Block Specific Apps on macOS

Is there a way to block a list of specific apps on macOS? I have looked up solutions such as Cisdem, but there are some holes in the way it works that I don't like. Unless you also block Activity ...
16
votes
6answers
96k views

Terminal returns not found for most commands Mac OSX

I'm really new to Mac OSX and UNIX based systems. I wanted to run a few Windows games on my Mac Mini so I started installing Wine and MacPorts. Having done so, I typed in sudo port install wine and ...
267
votes
1answer
84k views

How to prevent Mac from changing the order of Desktops/Spaces

You may have encountered a situation in which Mac changes the order of desktops based on some events like alerts on a program or a web page in browser. How could I disable this logical change? Note: I'...
71
votes
4answers
84k views

Do MacBooks have a true “Hibernate” option?

I've recently switched from Windows to a MacBook pro. In Windows, there are the following shutdown options: Standby - the machine goes into a "light sleep" from which it can awaken very quickly (like,...
16
votes
8answers
504k views

How do I create a Mac bootable USB drive using Windows?

My MBA 2012 with OS X 10.9.4 Mavericks won't boot anymore - it simply freezes after the initial jingle. I already tried resetting NVRAM and SMC, but to no avail. I don't have any time machine backups. ...
6
votes
4answers
16k views

Messages won't let me sign in to iMessage

On my OSX laptop (10.8.5) I've recently been unable to sign into iMessage. By recently I mean approximately a week. I've not done any updates that I recall lately. Coworkers are able to send me ...
215
votes
6answers
97k views

Applications Don't Show Up in Spotlight

Spotlight has stopped showing any results for my Applications. I've tried reindexing and removing the index so it rebuilds it. No change. I've tried adding Applications to the Privacy tab and removing ...
109
votes
23answers
247k views

DNS not resolving on Mac OS X

Some of my coworkers are having troubles on their Macs - DNS resolution does not work under Mac OS X. They're running Snow Leopard 10.6.8. They can use DNS in a Windows 7 virtual machine (VMware ...

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