have a macbook pro 2011, have a lot off bugs on the screen, flashes and some time the screen frozen.
when I restart the mac its ok. when I select picture app and crome app. the bugs is back. have mackeeper and have tried to clean up. what other thing should I do
MacBook Pro 15″, macOS 10.13
Go step by step and test.
Reset PRAM: Reset NVRAM or PRAM on your Mac - Apple Support
Settings that can be stored in NVRAM include sound volume, display resolution, startup-disk selection, time zone, and recent kernel panic information. The settings stored in NVRAM depend on your Mac and the devices that you're using with your Mac.
Reset SMC: How to reset the SMC of your Mac - Apple Support Choose the appropriate method.
Quote:
Resetting the system management controller (SMC) can resolve certain issues related to power, battery, fans, and other features.
Startup in Safe mode. https://support.apple.com/en-gb/HT201262
To leave Safe Mode, click in the menu bar and choose “Restart”
Quote:
Safe mode prevents your Mac from loading certain software when it starts up, including login items, system extensions not required by macOS, and fonts not installed by macOS. It also does a basic check of your startup disk, similar to using First Aid in Disk Utility. And it deletes some system caches, including font caches and the kernel cache, which will be created again automatically as needed.
Go step by step and test.
Reset PRAM: Reset NVRAM or PRAM on your Mac - Apple Support
Settings that can be stored in NVRAM include sound volume, display resolution, startup-disk selection, time zone, and recent kernel panic information. The settings stored in NVRAM depend on your Mac and the devices that you're using with your Mac.
Reset SMC: How to reset the SMC of your Mac - Apple Support Choose the appropriate method.
Quote:
Resetting the system management controller (SMC) can resolve certain issues related to power, battery, fans, and other features.
Startup in Safe mode. https://support.apple.com/en-gb/HT201262
To leave Safe Mode, click in the menu bar and choose “Restart”
Quote:
Safe mode prevents your Mac from loading certain software when it starts up, including login items, system extensions not required by macOS, and fonts not installed by macOS. It also does a basic check of your startup disk, similar to using First Aid in Disk Utility. And it deletes some system caches, including font caches and the kernel cache, which will be created again automatically as needed.
Uninstall MacKeeper and any other cleaning apps, anti-virus apps, or third party security software by following the developer's instructions. These types of apps are not needed on a Mac and usually cause more problems than they solve plus they impact system performance.
In addition to @dominic23's excellent advice you may want to run the Apple Diagnostics to see if any hardware issues are detected. To look for possible software issues run EtreCheck and post the report here using the "Additional Text" icon which looks like a piece of paper.
If you have the 15" or 17" model, then you may have a bad GPU. You can try to force the laptop to use the Intel GPU instead by running gfxCardStatus:
https://github.com/steveschow/gfxCardStatus/releases/tag/v2.4.4i
Edit: Also just thought that you may have bad memory. The memory slot nearest the Bottom Case many times develops cracked solder joints after a few years. If the memory slot has cracked solder joints, then holding the laptop or pressing on it (especially on the center of the Bottom Case) can trigger a system freeze and/or graphical glitches on the screen. Removing the memory module nearest the Bottom Case can prevent this issue. You may also want to check that the other memory module nearest the Keyboard is still latched in place by pressing on it. Many times that memory module becomes loose especially when inserting or removing the memory module nearest the Bottom Case since both modules share the same latching arm.
bugs on screen macbook pro 2011
