Fixes for macOS High Sierra Problems. Days 7-11 After Update

Sorry I was off for a few days. But, here are common fixes to common High Sierra OS problems in the days 7-11 after the update.

  1. Not able to drag and drop files or folders to copy and paste them

This is a weird problem. It is not that macOS High Sierra doesn’t allow you to copy or paste files and folders. It is track pad settings that is actually preventing this from physically registering as a movement! To fix this, simply do the following.

Go to System Preferences -> Trackpad -> Point & Click -> Un-Check the box that says “Force Click and Haptic Feedback”

Disabling this will mean that you will run into weird UI problems elsewhere. You might have to click a few times to make the click register. But, the fix above will fix your copy paste drag drop issues for now. I am 100% sure that Apple will release a patch to fix this Haptic feedback issue.

2. Mac very slow to boot after High Sierra update

If your Mac acts fairly normal except for when it is booting up on High Sierra, it is a problem you may be able to fix very easily. Apply the fix suggested below.

You will need to change your TRIM settings for this.

Go to Terminal.

Once there, copy paste the following command

system_profiler SPSerialATADataType | grep ‘TRIM’

If the response is in the negative (if it says no), type the following.

sudo trimforce enable

If the response is in the positive (if it says yes), type the following

sudo trimforce disable

As you can imagine, this is a shot in the dark fix but some users have told me that both disabling and enabling the TRIM option has allowed their Mac to boot up as normal. TRIM is usually enabled if your Mac runs an SSD. TRIM allows your disk to actively erase blocks of data that are not necessary to your Mac. Sometimes, this process can help while sometimes it actually can prove to be a burden.

Try the fix I suggested to see if your High Sierra slow to boot issues will go away.

3. Is there an update to High Sierra available?

Yes! There is a supplemental out and it was released yesterday. Go to your OS update settings page and you will see the button to quickly install this supplemental update. It has helped a lot of people pick up the pace on their Mac, after the initial install to High Sierra they might have made a few days ago!

4. Mac only runs on WiFi and ignores LAN connection

If you have a solid LAN connection but your Mac is still preferring WiFi over LAN, here’s a tweak that will fix that issue for you.

Go to your Mac’s System Preferences. Network -> Check for the order of networks listed on the right side of the Network window. Is your WiFi listed before your LAN (Ethernet) connection. If it is, you just need to change the priority order. To do that, click on the settings icon or the cogwheel icon at the bottom of the list and use the + and – buttons to manipulate your Ethernet connection to the first place. Click Apply and restart your Mac with the LAN plugged in. This time, your Mac will ignore your WiFi since your LAN is plugged in!

5. Mac freezing when I try to upload a document in any application

This might be an iCloud problem. Temporary disable the iCloud Drive and try your file or folder uploading and it might work just fine. Once you are done uploading the file, enable iCloud again if you need its functionality. Though not very ideal, it will allow you to continue uploads without freezing your Mac. Apple should be releasing a patch for this pretty soon I would think.

6. “The recovery server could not be  contacted.” error

Unfortunately, this is something you can do diddly squat about. It just means that Apple’s servers are super busy. You will just have to wait it out or keep trying multiple times and hope that you get lucky with a forced inclusion in the queue that they seem to be experiencing.

7. Getting the “The IMAP  command UiD Copy (to Trash) failed for the mailbox INBOX with Server Error: UID Copy Command is not valid in this state. Or, what is called the not  able to delete Mac Mail messages from the Server.

If you deleted some Mac Mail messages but see it right back to where it was when you log back into Mac Mail, the following fix might help.

Go to Mail, then Preferences and select the account that is malfunctioning with the unable to delete messages error. Then, select that account and then go into Mailbox Behaviors. Go to Trash Mailbox. Select On My Mac instead of the default trash location assigned to that particular account.

This apparently seems to be a problem being faced by Yahoo email holders who have their Yahoo mail ID set up on Mac Mail.

7. High Sierra not running apps in full screen mode

If you are usually used to all your apps opening in full screen mode and don’t like the random minimized sized windows High Sierra keeps throwing at you, here’s a simple fix.

Go to System Preferences  and un-check the box that says “Close Windows when quitting an app”. You might still have to maximize your apps once after restarting it, but the problem will go away after that.

That’s all for now. If you have slow performance problems with High Sierra, please read our post on the top 10 fixes to fix a slow High Sierra Mac. https://elcapitanslow.com/macos-high-sierra-slow-fixes/

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