![]() Remember, you can always add a removed app back to the Login Items list if you need to. Start by removing login items you no longer use, and then remove those you don’t actually need to run automatically. The actual process to remove a login item is an easy one, though deciding which ones to remove and which to keep may be a bit harder. Removing login items can increase the resources available to your Mac and improve performance. It’s also likely that the older helper app that was left behind is merrily using resources for no actual purpose. This can result in delays when your Mac starts up, or cause issues when launching or using other apps. ![]() To make matters worse, in some cases the login item that is running is for an app or service that is no longer present on your Mac or is no longer supported by the current version of the Mac OS. Having too many login items running can impede performance. ![]() Remove unused and out-of-date login items, such as EyeTV Helper, which has been on my system for years even though the EyeTV app is long gone.Įither way, login items make use of some of your Mac’s resources, such as RAM, CPU, and GPU. Login items can also include apps that you have manually added to the Login Items list so that they will launch and be running whenever you log in to your Mac. It’s not uncommon for apps to install Login Items (sometimes referred to as Startup Items) into a user’s account the login items are usually small apps or helpers that work with the app in question to provide a service the app needs. ![]() If you’re still experiencing slow startups, it could be because of excess resources being used by Login Items. This is normal as your Mac performs routine housekeeping chores, removes old temp files and caches, and rebuilds new ones.īut once that initial startup is complete, your Mac’s subsequent startups should no longer seem slow. Be aware that the first time you start up your Mac after upgrading to Catalina or any new version of the Mac OS, your Mac may indeed experience a slow startup. Slow Mac StartupĪfter installing macOS Catalina, you may notice your Mac is a bit sluggish when starting up. Once you have your backup, let’s get your Mac running like a champ. Check with the developer, and upgrade to a Catalina compatible version, if needed. Don’t assume a third-party backup app that you’re using still works with macOS Catalina. That means before you try any of these tips, you should have a current backup to restore from should anything unexpected happen. Many of these tips involve modifying the Mac’s system in some way. No matter what the performance issue is, these tips are a good place to start to get your Mac back on its feet. If you’re one of the unlucky ones experiencing a slowdown, perhaps slow startups, logins, or application launches, maybe your Mac is just performing poorly in general. In this case, the error appeared on a Linux when trying to upload code due to the drivers not being installed and the root permissions.Did you recently upgrade to macOS Catalina? After the initial thrill of seeing a new desktop and exploring new features, did you notice that your Mac isn’t as fast as it used to be? While it isn’t normal for the Mac to slow down after a system upgrade, it has been known to happen. language:bashĪvrdude: ser_open(): can't open device "/dev/ttyUSB0": No such file or directory You may receive an avrdude: ser_open(): can't open device error similar to the output shown below. If you installed the drivers for the CH340 on your computer but have issues connecting via serial terminal or uploading code using the Arduino IDE, there may be an issue with your user settings preventing you from using the CH340. COM Port Not Available Windows, Mac, and Linux Users seem to be able to eventually get the board recognized by a combination of giving the computer time to finish the install ( close to 20 min), plugging the board back in multiple times, reinstalling the drivers, and/or resetting the computer multiple times ( repeat both steps). Others have had issues where the installation process hangs.īased on the customer experiences, this might be specific to the manufacturer and are usually isolated cases. However, the board cannot be accessed on the Arduino IDE. ![]() We have had a few reports on Windows 10 where the driver will automatically install and the board will show up under a new COM port as USB-Serial CH340, but with a different device name. Troubleshooting COM Port is Not Showing Up as CH340 Windows ![]()
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