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Questions tagged [macos]

macOS (formerly Mac OS X and OS X) is a series of Unix-based graphical interface operating systems developed, marketed, and sold by Apple Inc.

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mounting /dev/sda on /media failed error [closed]

I tried using the iso file from the Kali website to install Kali. I am using a MacBook Air M1. I encountered the error mounting /dev/sda on /media failed many times. How can I try and solve this ...
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VPN does not hide true location on the Maps app on Macbook

I am using a VPN (NordVPN). I am seeing the VPN IP in browsers - this is ok. However when I check the Maps apps on my mac, it shows my true location. How can I ensure that my true location is hidden ...
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OS on external drive -- is it safe?

So I'm installing macOS to my external hard drive partition, so I can have a 100% clean environment where I can engage with cryptocurrencies. (Exchanges, stable coins, protocols, putting actual money ...
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Compromised machine. Should I create a partition or volume to install a clean OS?

My goal is to create a 100% clean environment where I can interact with cryptocurrencies. For that, I can partition my disk or I can create a volume. Which one should I prefer? Some context about the ...
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-1 votes
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How do I engage with cryptocurrencies wallets in a compromised computer?

I am using a Mac machine and I suspect it has been compromised. Would partitioning the disk and installing a clean OS on this disk just for cryptocurrency activities solve the problem? That would be ...
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8 votes
1 answer
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Is Mac OS safer to use as far as firmware rootkits, cold boot attacks and evil maid?

Windows machines have things like TPM and Secure boot to help protect against firmware rootkits, but is Mac any safer in these regards? How does Mac work in the boot stage and is it any less ...
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1 vote
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Need help cracking a MacOS Catalina password

I have found the hashes for the stored passwords on my mac, I do not have the administrator passwords, I do have the hashes coming from the /var folder. I have tried decrypting it using hashcat but it ...
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3 votes
2 answers
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Cipher suite choice on macOS on Apple Silicon

I have a postfix mail server that accepts these cipher suites: tls_high_cipherlist=ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256: ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384: ...
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Virus from Embedded Image in Mac Mail?

I'm using macOS High Sierra, and mac Mail version 11.3. I have a script that uses the Twitter API to continually fetch tweets in real-time and send the contents of each of these tweets, including any ...
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When I visit an http://gofile.me/ link, how much information to I provide to the NAS server owner?

There are files I need from a heavy NAS user and they've given me a link of the form http://gofile.me/xxxxx/xxxxxxxxx If my laptop running the Chrome browser in macOS is connected to the internet via ...
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Suspicious MAC address when using personal hotspot (iPhone and MacBook Air)

Personal hotspot connection from iPhone 12 used on my MacBook Air. Under Settings - Mobile Data - Personal Hotspot (iPhone), I see 2 data usage components: 1.5 GB - MacBook 20.2 KB - A suspicious MAC ...
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Is it possible to bruteforce Yubikey's PIN when using it as PIV/Smart card?

I'm considering using Yubikey to log in to my Mac. However, in my threat model I have to assume that it will fall into the wrong hands, hence the question: does Yubikey have any mechanisms that ...
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Is it a security risk that macOS Keychain.db files are accessible by any process on the system?

This question might have an obvious answer but I think a clear explanation is a missing piece on the internet. Isn't it (or is it) a security risk that macOS's Keychain.db files located at ~/Library/...
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Read files protected with System Integrity Protection with sudo

I had a debate with a friend about the security model in new OS X versions. OS X El Capitan and newer have the System Integrity Protection security feature which protects aspects of the OS even from ...
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How secure is OpenCore Legacy Patcher?

My MacBookPro doesn't get major updates anymore, but the hardware still works well. I came accross OpenCore Legacy Patcher, which allows to install recent versions of MacOs onto older macs through ...
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Does MacOS Filevault + Mac hardware obviate lengthy login passwords?

Take the combination of an encrypted disk with a secure enclave chip that never exposes an internal Key Encryption Key and throttles or prevents too many password guesses. Seems to me that this should ...
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1 answer
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Postgres.app security on a Mac?

I'm wondering if there are any security concerns with installing PostgreSQL on a Mac using the app? https://www.postgresql.org/download/macosx/ I had a look at the data folder and it's owned by me ...
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2 answers
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Is Xcode vulnerable due to log4j?

After the log4j vulnerability was announced, I scanned my Mac to see if any applications were using it. find / -name "*log4j*" 2>/dev/null Here's the output that indicates that Xcode has ...
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1 answer
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hashcat skipping gpu even if it's recognizing the device and the driver is installed

I'm trying to run hashcat on a MacBook Pro. Running hashcat -I to check the devices' informations yields: hashcat (v6.2.5-38-g8b61f60e8) starting in backend information mode OpenCL Info: ============ ...
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1 vote
1 answer
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Mac os x installation partition integrity

Let's suppose i lend my new macbook to a (dishonest) friend. This is a new fresh macbook, just unboxed. My friend does what ever he wants on this macbook. One month later, he gives me back the macbook....
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Can someone on same wifi access my computer? [duplicate]

I was connected to a hotel wifi and airport wifi last week. Some of the files in my Downloads folder now has been compromised (soft keys stolen). Can someone connected to same wifi gain access to my ...
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Can work system admin remote into my personal Mac when I connect to work VPN? [duplicate]

I usually connect to my work VPN on my personal Mac and then use Windows Remote Desktop client to access my work computer. Today on my Mac while disconnected from the VPN I noticed the username/...
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How to know which IP address is used for my DNS queries on macOS?

I'm not an expert, only have basic knowledge about all this but I'd like to understand what's going on so please bear with me. I'm currently using a VPN (IKEv2 protocol) on a macOS system and I can ...
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How does FileVault work with Time Machine?

Let's suppose a Mac OS computer with two users: user1 and user2. These users are not administrators. FileVault is enabled. The computer is connected to an empty external hard drive for Time Machine. ...
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How to get EvilOSX's Slowloris to work?

I was trying out the Slowloris Module of EvilOSX. I've also installed the Homebrew Apache server on my victim VM using this link. However, when I executed the module, I noticed some packets started ...
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Hybrid-Analysis.com indicates the website that my macOS system is contacting is likely malicious

Backstory: I just upgraded my MacBook from OS X 10.11.6 to the most updated version of macOS, 10.14.6 Mojave. I also have the Little Snitch network filter installed. I know nearly nothing about ...
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Safe or Unsafe to Store Passwords in Chrome on MacOS?

I've seen conflicting opinions on this, more than the below, but i.e. Unsafe: https://www.techrepublic.com/article/why-you-should-never-allow-your-web-browser-to-save-your-passwords/ Safe: https://...
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10 votes
7 answers
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Can you create a fake (malicious) Ubuntu iso

Recently I got into an exchange with someone on social media about the security of Linux versus OSX and Windows. I stated that it is possible (and probable) that someone could code a low level back ...
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0 votes
1 answer
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How is my Macbook connecting to my WiFi APs without asking for a password?

When I work away from home (and home wifi) I use my phone's hotspot to connect my Macbook to the internet. However, it's always surprised me that I just have to click on the name of the hotspot to ...
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How Does it Work - User Authentication using Yubico Smart Card (Yubico PIV) on Mac

Background: I have setup my macOS Catalina so that I can authenticate my user account using my Yubico (set up as a Smart Card) and its PIN After setting this up I can see that there are now 2 ...
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MacBook Pro is Powered On but Locked. Is my VeraCrypt data Readable if Laptop Stolen?

Secenario Consider the case of a MacBook Pro with FileVault active. The computer is on and I'm properly logged on. I frequently need to access sensitive data located in text files on an encrypted ...
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2 answers
361 views

Is Mac OS Big Sur Spying?

I would like to know if macOS "Big Sur" sends unencrypted OCSP requests. I am a newbie and not aware of technical stuff, but when I came across Jeffrey Paul's article, I am a bit concerned ...
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2 votes
1 answer
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How to verify a x509 certificate from Apple on a Ubuntu server?

I'm trying to verify GameCenter authentication on an iOS app with GameKit. The fetchItems API returns a URL for the public key needed to do this. Steps 3 and 4 of that API say: Use the publicKeyURL ...
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26 votes
5 answers
6k views

How can a non-admin program cover your entire screen with a window?

This year, since many students are online, College Board (the company that administers AP Exams in the US, along with the SAT) recently released its Digital Testing App. Once installed, and going ...
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1 answer
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How best to crack password for MacOS encrypted .dmg, given I know the majority of the password content? [closed]

Encrypted .dmg on MacOS High Sierra, tested password before sending for repair. Upon return from repair, password does not work. The possibilities I see are the .dmg file is corrupted, or I'm wrong ...
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Recovering files with recovery key after double FileVault activation - is that possible?

Let's imagine I have a work macbook with ssd and I use FileVault, and the company has the FileVault recovery key. I want to make sure my data is erased and unrecoverable, what is the best way to ...
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1 answer
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Old operating system (offline computer) need to come online for a few minutes

OSX El Capitan I have an offline computer running an old OSX operating system. I would like to connect that computer to the web for a brief few minutes in order to install HomeBrew and install a newer ...
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1 vote
1 answer
229 views

MacOS Firewall Needed or Unnecessary?

Coming from Windows to macOS, I was surprised that the firewall was off by default. I immediately turned this feature on. Would this be necessary? Are there some cons to having the firewall on that I ...
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119 views

How can I forcibly block all the Internet traffic that doesn't go through a VPN to prevent accidental IP leak?

I need to block all the Internet connections that don't go through a VPN server before they even get the chance to happen. How can I achieve this on Mac OS Big Sur? Mac OS doesn't seem to have any ...
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0 votes
1 answer
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What to do after a scammer took control of my mac?

A friend of mine called me in panic mode to tell me that "a message told her her computer was infected, and that she should call the phone number". So did she. Apparently, a lady made her ...
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1 answer
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Is flash less secure now that it is End of Life? [closed]

As of this month, the Flash player has been disabled from all mainstream browsers. However, several platforms are still offering ways to use Flash content, most notably the games hosted on said ...
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2 votes
1 answer
1k views

Bitwarden and gamecontrollerd on OsX Big Sur

Recently, I came across an issue concerning a daemon named gamecontrollerd in OsX Big Sur. On my laptop I'm running ReiKey (from Objective-See), which aims at identifying possible Key Loggers that ...
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2 votes
1 answer
456 views

Can malware infect computers via wifi routers and mice? [duplicate]

My computer was hacked, which probably resulted in malware/a virus being installed so I'm using my most recent backup on a separate machine (all macOS). Luckily, I was able to determine the timing of ...
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1 vote
2 answers
522 views

Can a .jar file execute malware on macOS without running it?

I've heard java files can pose a significant security risk due to vulnerabilities. Is it possible for these java files to infect a computer with malware if they are never run? In my case, I am ...
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Avast Remote Access Shield is blocking unknown remote access attempts to my computer (Win10) coming from a MacBook device on my LAN. [Confused]

I need help understanding what is happening on my LAN and determine if a malicious attack is taking place. The "attacks" started to occur for the first time last night. This morning, I open ...
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1 answer
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Can visiting website infect computer? [duplicate]

I have heard online that simply visiting a website can infect a computer. I had an instance recently where someone I know sent me a link but misspelled it. The misspelled link lead to a malicious ...
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1 vote
1 answer
171 views

Would VirtualBox sandbox potential viruses from main system?

I am working with several maintainers of Homebrew currently to verify that several programs in the cask library now ship from the developer with trojans. To verify the claims I created a Virtual ...
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1 answer
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Secure MacOS against malware and external threats?

Often I am required to connect to public wifi or open files that others send me. Doing so opens me up to possible credential theft as well as possible viruses or malware. Thus far I have done my best ...
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1 answer
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Potential danger of infection through downloading malware?

Recently I was on Nox Player's website checking out their Android emulator. I did some googling and came to the conclusion that it was bundled with tons of malware and as a result didn't install it. ...
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3 votes
1 answer
594 views

Is homebrew's change of usr/local/bin to r/w a security issue?

I've been reading online that homebrew changing usr/local/bin to r/w could pose a serious security issue as usr/bin is the path after usr/local/bin. Article found here: https://applehelpwriter.com/...
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