Hot answers tagged

46

No, your Mac is not possessed. And Yes, it’s trying to tell you something! A looping three beeps in between three seconds during startup is your iMac’s way of telling you that the operating system you’re trying to boot into is incompatible with your Mac hardware. In other words, the Snow Leopard disc you’re trying to boot from contains a version of Snow ...


36

This cable costs $39 retail. At this price I am expecting better performance for charging than what I'm getting here. How could I diagnose this issue? There's nothing to diagnose because everything is operating as it should. The problem is not the cable (it's irrelevant, actually) nor the iMac as it's only capable of delivering up to 15W of power via ...


20

Do LAN transfers use both Ethernet and WiFi by default? No. The default action is to use the one with the highest priority. This is usually done by the order of the interfaces that you specify in Network Preferences. Following that, the next order of priority is network latency. If not, is there a way to enable transfers to use both? What you are ...


9

You're not going to find a Thunderbolt 3 to Thunderbolt 2 cable as an adapter is required to connect to legacy devices. One of the (major) differentiators between Thunderbolt 1/2 and Thunderbolt 3 is that Thunderbolt 1/2 required the cable to be active (it required power to operate) whereas Thunderbolt 3 can use standard USB Type C cables (it's passive)1. ...


8

I don't think a straight-up cable exists, no. However, you can get an adapter/dongle that works perfectly well for your scenario. You'll need to Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 adapter: https://www.apple.com/us_smb_83039/shop/product/MMEL2AM/A/thunderbolt-3-usb-c-to-thunderbolt-2-adapter You can read more about the adapter here: https://...


7

I am going to buy an old iMac G3 Over the next couple of days/weeks, and I want to make sure that I am buying a system with no problems. Assuming you're getting the Bondi-Blue iMac G3, you're looking at a machine with 20 years on it. Getting one with "no problems" is a tall order and akin to buying a "reliable classic car." Some of the issues you can ...


7

On the iMac, there's a setting under System Preferences > Energy Saver called Start up automatically after a power failure, which I'm guessing will be selected on your system, and hence would explain your computer's spontaneous rebooting. If you don't wish this to happen in the event of a power failure, or the next time you turn off the power by accident, ...


7

According to Apple the best way to charge your MacBook Pro is with the included AC adapter. They don't mention plugging into an iMac specifically, but based on your report of a long predicted charging time, I'm going to guess that iMacs don't put out as much energy over thunderbolt as the AC adapter. According to this page on the Thunderbolt 3 Cable, it is ...


6

I've got the same exact issue on two brand new 2018 MacBook Pros. error code is the same too reportID 0xB8 error 0xe00002d7. I still think this has to do with failed firmware downloads, but Apple denies that's the case. It's only when the bluetooth peripherals disconnect that I see the attempt by fud (firmware update daemon). And they seem to fail. Here's ...


6

Yes, you can mix them. There are 4 slots, so you can keep the Apple RAM, even if it's in 2 slots. According to the reliable EveryMac, your Mac can take up to 128Gb !!


6

You can set NVRAM options from command line to boot into recovery: sudo nvram "recovery-boot-mode=unused" sudo reboot This will put your system into recovery mode. NVRAM (nonvolatile random-access memory) is a small amount of memory that holds certain settings and can be accessed at boot by the Mac's firmware.


5

If not, is there a way to enable transfers to use both? Yes. While it is complicated (or, with cheaper devices, impossible) to do this on the link, network, or routing layers, you can use both Ethernet and Wifi by "bundling" your two links on the application layer easily. Put both your devices on Ethernet and Wifi; and make sure Ethernet/Wifi are in ...


5

iMac is a consumer desktop computer and doesn't come with a built in battery. Neither is it possible to install batteries in an iMac. Unlike a laptop (MacBook) an iMac is not portable and have to be kept plugged in to a power source while in use. Whether an iMac can be used as a replacement for a laptop depends on your specific workflow. It runs the same ...


5

You should have matching DIMMS in order to maximize performance / dual channel functionality. Also note that RAM is going to operate at the lowest speed of all the DIMMS, which is another reason why they should all match. That being said, it shouldn't be operating that slowly. I would start with removing the original 4 GB stick, possibly doing a PRAM ...


5

If you mean Target Display Mode, then no - that was a feature only available to a select few iMac models & now defunct. See Apple KB - Use your iMac as a display with Target Display Mode for details. It was essentially available on iMacs between 2009 & 2014.


4

Well, I had the same problems on My Macbook Pro 2018 with randomly disconnecting magic touchpad and keyboard. I found resolution here: https://www.reddit.com/r/macbookpro/comments/9brybd/issues_with_disconnecting_mouse/ So the problem is with usb type-c concentrator: if it is connected to the left side ports - it causes random disconnects of bluetooth ...


4

Nimesh’s answer is very clever and requires no extra tools, so that may be what you want. However, there is a much easier way, if you are willing to spend a few minutes to download and install some apps/tools once in order to have a simpler way to turn Bluetooth off/on in the future. First, download and install blueutil from http://www.frederikseiffert.de/...


4

I do agree with @Allan largely. But to answer/elaborate the specific question: what you'd ideally want to do is run AHT. These used to be included on a partition of the install disks a machine would ship with, but the AHT (Apple Hardware Test) disk images are still available online. And though the AHT support page index is gone, you can find it preserved at ...


4

Sounds like you have accidentally activated Mouse Keys. Turn it off https://support.apple.com/kb/PH18381


4

Whether it's 'worth it' will be up to you. You can get 16GB RAM in there & you can swap the HD to an SSD. The SSD will feel like day after night compared to an HD - especially as you're on an OS that is designed for SSD & almost forgets spinning rust ever played a part. You will be bound to 10.13 so you might not need more RAM unless you’re ...


3

Hopefully this may help. I was having similar problems whereby my trackpad was connecting/disconnecting and being a general PITA. I searched all over and found this thread amongst others. I then also found the following article and noted about it could potentially be due to too many bluetooth connections. https://michaelkummer.com/technology/mac-bluetooth-...


3

I just had an issue with not being able to change the brightness on my 27inch iMac in Target Display Mode. It was at full brightness. And the brightness keys on the keyboard hooked up to the TDM Mac would not adjust it. But I found if I pressed and held Commond-F1 on that keyboard it slowly lowered the brightness. This probably won't help much if you have an ...


3

i had the same problem and i solve it... in mac go to facetime and go to preference and just unclick the phone calls allow in this device...problem solved


3

Got exactly the same problem today, e.g: have two-factor auth. tried login to icloud on some old macbook (OSX Lion - 10.7) on my iphone i got the code but on the macbook there are no input fields - e.g. impossible to enter the code - there is no place where. More googling and I found this page: https://support.apple.com/en-us/HT204915 where says: What ...


3

Awhile back, I discovered an even better, simpler, more reliable, and free way to accomplish the goal of screen sharing without people being able to mess with the remote mac or observe you working. All you have to do is: Create a secondary user on the remote mac. Screen share into your account (assuming it's the one that has the screen locked). Use fast ...


3

Not all RAM is created equal. The way motherboards handle things is radically different. For example where an ASUS PC motherboard might take mismatched RAM, the iMac will not. To ensure compatibility use RAM that has the same: Clock Speed Voltage Requirement Latency timings It's best to buy identical RAM sticks. They should be the same manufacturer and the ...


3

The iMac in your screenshot comes with the Intel i5-7360U CPU. The Mac Mini comes with the i3-8100B CPU. If you look at the PassMark benchmark, the i5-7360U CPU benchmarks at 5823 passmarks multi-threaded and 2047 single-threaded. If you look at the Geekbench benchmark, the i5-7360 CPU benchmarks approx. 9075 multi-threaded and 4375 single-threaded. In ...


3

If the internal hard drive is empty, then you just need to select it in Time Machine settings as the target. There should be no other setup necessary. If it is not empty, and you cannot empty it, you should partition it first. However, if it is the wrong format, Time Machine will need to wipe it. It needs to be MacOS Extended (Journaled) for Time Machine to ...


3

The USB section of the System Report actually provides data for each of the USB devices connected to your Mac. The information you're asking about relates to each of those devices. More specifically: Current Available is the standard amount of power (in milliamps) provided by the specific USB port Current Required is the amount of power (in milliamps) ...


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