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Questions tagged [usb]

Devices that use the Universal Serial Bus data interface

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Bootable USB stick trying to install on USB instead of hard drive

So I‘m trying to install Ubuntu for Dual Boot on my MacBook Pro. I‘m running macOS 10.14 with APFS, created a new partition formatted as FAT32. Created bootable USB stick with Etcher and so forth. So ...
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My USB device (camera) works but doesn't have device-entry. How to find it?

My USB device (microscope camera) works with my MacBook (lite version of a microscope software) but doesn't have device-entry, although it shows in the USB tree in system information and has location ...
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Set default boot disk to USB on macmini with T2 chip

I need to setup boot always from USB stick. I can boot it from USB by pressing Alt and selecting specific source. Buy how to do it permanently? Is is possible?
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MacBook Pro: USB 2.0 flash drives not working while USB 3.0 drives work fine

I have a Late 2013 15 MacBook Pro. After updating it to macOS High Sierra 10.13.4, USB 2.0 flash drives has stopped working. They are simply not recognized by the operating system. However, USB 3.0 ...
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13 views

Macbook Air USB ports stop working one after another until none (of the two) remain

I have a 2017 Macbook air that has a nice habit of sequentially disabling USB ports (even while they are not being used). I am forced to restart my machine at random times in order to get them back to ...
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1answer
22 views

How can I charge powerbank that has single C-type in/out from MacBook?

I’m using Xiaomi Power Bank 3 which has following sockets: USB-A type low output USB-A type high output USB-C type power delivery input/output up to 45W It usually works fine, I can use MacBook ...
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32 views

OSX 10.14.4 now Requires Reboot to see External USB Drive

ENVIRONMENT I'm running OSX 10.14.4 on a mid-2015 MacBook Pro. Plugged into the MBP is the MagSafe power cord, and a Thunderbolt 2 cable connected to a 27" Thunderbolt monitor. That monitor is ...
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14 views

Plug in mouse on USB, Macbook crash then reboot

Sometimes happens that my macbook pro 2009, reboot when i plugin a usb mouse: Anonymous UUID: F7E860F6-8C86-01A6-6879-40F90DC7168D Sat Apr 13 09:30:00 2019 *** Panic Report *** panic(cpu 0 ...
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1answer
27 views

What are possible reasons for external keyboard input lag?

I have a "Microsoft Sculpt Ergonomic" keyboard, connected with USB to my Mac 13" (from 2018). The keyboard input starts to lag at some random times. I have been using the keyboard on my older Mac 15" (...
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1answer
66 views

Strange circular USB icon in Finder

I've got a minor problem which has been irritating me for some time. Whenever my Mac has a USB storage device mounted in Finder, it shows a circle instead of the usual USB icon. I'm not sure when ...
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2answers
120 views

How to create a Windows 10 bootable USB on a Mac for PC without Bootcamp, when install.wim is too large

My Boot Camp assistant seems to be having problems (first I get not enough space, 40 GB, etc.) which I fixed by making a partition using Disk Utility, but then I didn't get an option that others seem ...
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1answer
51 views

Can you use a bootable macOS USB created on a MacBook pro, to install macOS on another MacBook Pro?

So my friend has a 2011 MacBook Pro. The laptop's hard drive crashed and no longer works. He bought a new SSD as a replacement, but he doesn't have a way to install macOS on this new SSD, because he ...
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32 views

Assign serial number to USB device

I have 2 identical USB devices (Zoom F8 multitrack field recorders) which connect as a standard audio interface. I'd like to create an aggregate device using both devices. macOS definitely "sees" both ...
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1answer
28 views

Macbook battery runs flat while “charging” with nearly full USB Brick

Road warriors buy Macbooks for untethered working and at times find themselves in a place without a powerpoint. So charging a Macbook from a USB Brick is a fundamental operational requirement. I ...
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1answer
94 views

Is there a way to get macos to recognize my external hard drive without rebooting the operating system?

I have a 4TB external drive connected to my 2015 macbook pro. It has 2 2TB partitions. I use 1 for time machine backups and the other for other files. From time to time when I plug it into the USB ...
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59 views

How can I evaluate the safety of these Magsafe 2 USB-C Charge Cables?

They look like and claim to be USB-C to Magsafe 2 cables, that allow you to charge up on the go from a USB-C wall adaptor. Link 1: https://jgotech.com/collections/usb-c-power-delivery/products/...
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16 views

How can I stop my Mac from automatically using my [input only] USB microphone as an output device?

I have a 2015 MacBook Pro on the latest version of High Sierra. I often use a USB microphone for Skype, etc. When I plug in the microphone, my Mac automatically detects it as an input source. This ...
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2answers
47 views

How do you read /dev/tty.iap on iOS? [closed]

I want to access data from a USB device attached to an iPad on that iPad. So far, I've written a basic app that detects whether files exist or not on the iPad. However, it says the /dev/tty.iap file ...
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1answer
39 views

Is is possible that a software issue could be causing spotty USB-C connections on 2017 MacBook Pro?

I have a 2017 MacBook Pro. It has 2 USB-C ports on the left side and I use an Aukey hub to provide more ports (4 USB, 1 HDMI, 1 USB-C) and always to connect two monitors. I connect one monitor ...
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74 views

Slow read/write speed (40MBps) with USB-C external SSD on Macbook Pro

I had a Sandisk Extreme Pro 500Gb PCIe NVME M.2 SSD. I got an USB-C 3.1 Gen 2 Enclosure for it. I have tried it on 3 different 2017 and 2018 macbook pros and an iMac. The Max read/write speed that I ...
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1answer
34 views

Can I install dual-boot OS on the external USB drive?

I have a MF839 MacBook with Mojave and I want to install Linux as my dual-boot system on the external USB drive. I have one USB with 8GB and one with 64GB. On 8GB I will burn my .iso file with Debian-...
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1answer
31 views

Can I plug my 15" 2017 MacBook Pro into a USB-C display while using the charger cable?

I've bought myself a Dell U2719DC display, which allows your device to charge when connected via USB C. However the maximum charging ability is capped at 65W, whereas the stock 15" MacBook Pro charger ...
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20 views

USB laptop keyboard controller for MacBook Pro keyboards?

I have an old, broken MacBook Pro 13" (non-retina) and like the keyboard. There are obviously some hacks to convert existing laptop keyboards into stand-alone USB keyboards, by using a custom-made ...
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46 views

HDMI not working on 2018 MacBook Air in Bootcamp Windows 10

I have a USB-C hub that includes an HDMI port. This works fine while running macOS but not in Windows 10 Bootcamp mode on a 2018 MacBook Air. My multi-part question is [a] is this a driver problem [b]...
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49 views

GUID Partition Attribute not working on MacOS

I'm trying to prevent automount on a device. The device contains only one FAT32 GPT partition. I have set the GUID Partition attribute to 63 using gdisk (i.e. do not automount). I have also tried ...
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78 views

usb drive very slow on mac, works fine on windows

i have a 2015 macbook pro, with usb c ports that require an adapter. i have one usb drive that i use to transfer files between my macbook and an internet-incapable desktop pc, and everything i try to ...
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1answer
17 views

How do different methods of connecting USB-C display work?

There are multiple ways how we can connect an external display via USB-C to an Apple device (say MacBook Pro). For example: directly (e.g. LG UltraFine) using Apple's USB-C to HDMI/VGA/DVI dongle ...
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20 views

What explains intermittent I/O errors for all attached volumes?

Two external volumes that are both having I/O errors. This is a small bit of console output. One is an SSD and the other is a regular hard drive. Both are relatively new. default 18:46:56.035095 -...
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1answer
136 views

Can you use a Thunderbolt 3 cable to connect two Macbook 12-inch in target disk mode?

I'm working as a technician and would like to learn the capabilities of these cables. I know a USB-C 3.1 gen. 2 can do it, but I'd like to know if a Thunderbolt-3 cable would do it. I know that you ...
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1answer
20 views

iTunes cannot locate missing files after I've moved them to a USB

I've been using iTunes on Mac for a while, but my startup disk recently got pretty close to being full so I figured I'd move all my music I had there from the iTunes Media folder to my USB drive. ...
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1answer
27 views

USB audio ducks when Notifications happen

I'm using a USB DAC (FiiO BTRK3). When my Mac gets a notification, it ducks the rest of the audio for about 2 seconds. It's a big duck too; All the way to 0 it seems. It doesn't happen when I'm ...
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17 views

Is it possible to cancel the revert core storage operation?

Something is off here. I issued diskutil cs revert /dev/disk6 and in the second, my macmini's USB controller stopped working and hard ejected (like pulling their plugs) all other attached USB devices....
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1answer
157 views

How can I repair my Mac so Time Machine backup will work?

I'm trying to backup my computer for the first time running Yosemite OS. The time machine fails, despite trying with two different external USB 3 drives with this error partway into the Time Machine ...
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238 views

Can’t clean install High Sierra on my mac

After downgrading to El capitan to test if my MBP mid-2010 would be faster ( which proved to be not significantly so), I decided to upgrade again to High Sierra, but I have found out that I cannot use ...
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11 views

USB HD that is R/W from Mac and Windows [duplicate]

If I have a USB external HD how can I format it so it is R/W from both Mac and Windows? Is that possible?
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36 views

Problems with Samsung Galaxy Tab 2 and macOS Mojave 10.14.3

I have a Samsung Galaxy Tab 2 with android 4.1.2, when I plug the usb cable to usb port in minimac, macOS don't detect my tablet. With Android File Transfer I can see the disk and the mini card in the ...
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1answer
28 views

how to find the last time I used my usb drive?

I used to have a Sandisk Ultra Fit 128GB stick plugged onto one of my USB ports of my MBP. I'm running OS X El Capitan (10.11). Today I found that my USB drive is missing. How do I find the last ...
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1answer
216 views

How can I create a bootable windows 10 usb installer on Mojave?

Boot Camp Assistant no longer allows to do this dd shouldn't be used for bootable sticks (see here) Using unetbootbin I can only write on FAT32 formatted USB, but that does not work (see here) How ...
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1answer
31 views

MBP on TB3-Dock ignores USB-Devices until reconnect

There are two usecases for my MacBookPro15,1: When I am on the road I just use it as it is without any peripheral devices. But when I am at home, I put it (with closed lid) in the book arc and connect ...
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1answer
29 views

Can I safely charge&use my macbook with the adaptor below? [duplicate]

I need to use an Ethernet cable, VGA monitor, usb connection and power cable in same time with my macbook. That's why i need an adapter because my macbook has only one usb-c port. Let me share a ...
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0answers
55 views

MacBook Pro USB disabled and dead battery. What to do?

I was constantly getting a notification that USB ports had been disabled due to an accessory using too much power. Most of the time there was nothing plugged in when I received the notification. So, ...
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0answers
14 views

MBP 2009 mid Prohibited sign at boot and cant boot into usb ether

I Got a MBP 2009 still with DVD I installed High sierra 10.13 with the (not officially supprted but MacOS Patcher made it possible) And encrypted SSD which my Company's policy demand you to do that if ...
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1answer
316 views

MacBook Pro 13" (2018) cannot drive 4k display @ 60Hz from right-hand USB-C ports

I have a new MacBook Pro 13" (mid-2018 Touch Bar). I'm connecting an LG 27UD88 external display directly via the supplied USB-C cable, which is also used to provide power to the laptop plus allows the ...
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1answer
87 views

MacBook Pro won't boot from USB installer or go into recovery. Tried everything

Hi I have a MacBook Pro (15-inch, Mid 2012) that won't boot using any method. Around 6 months ago, the mac started making loud scratching sounds, but they stopped after a day or so. However, a few ...
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1answer
53 views

Can you charge an iPad and connect a USB-C device at the same time?

There seem to be many USB-C adapter hubs, which convert USB-C to other types, and HDMI. When searching for "USB-C hub" you normally see adapters. However, I actually don't want a USB adapter, as they ...
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1answer
25 views

Trying to remove “FDisk_partition_schem” from USB drive

I'm trying to reset this USB drive so that I can use the 64.2 GB of space. I've tried diskutil unmount and it didn't work.
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0answers
314 views

USB-C to HDMI not working on USB-C port on dock

I have an Ansbell USB-C dock connected to my Macbook Pro. On this dock there's an HDMI port that is plugged in to one of my external monitors. This works fine. Also on the dock are two USB-C ports. ...
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99 views

Braided cable and USB-C adapter to resolve the Wifi/USB C interference on Macbook Pro

I've been reading an article about the interference problem between the Wifi signal (2.4 GHz) and most of USB-C adapters on the market. One of the solutions to solve this problem is to make sure that ...
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0answers
29 views

Macbook pro USB port works when connected through hub, but not when used directly

So, this is a very strange issue. One of the USB ports on my late 2013 13' Macbook Pro retina works when I connect it to the USB hub in my monitor through a male to male USB cable, but when I plug ...
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1answer
111 views

Using a Campark ACT74 action cam as a webcam in macOS 10.12

I recently got a Campark ACT74 action cam, with the intention of using it as a camera with which to live-stream stuff to Twitch and the like. Upon plugging it in to my Macbook Pro (2015, 10.12) --- ...