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very slow wake up since High Sierra, and spontaneous reboot

I encounter 2 types of problems since the upgrade to High Sierra:

- very slow wakeup after hibernate

- spontaneous reboot after x minutes of inactivity.

I have updated software to latest version (10,13,3), booted in recovery mode to check the disk already some weeks ago. All without results.

Now, inspired by another post, I ran etrecheck, to give a more in-depth view on systemconfiguration.

any help would be welcome.

thanks a lot,

Pieter

EtreCheck version: 4.1.1 (4A179)

Report generated: 2018-03-10 09:37:45

Download EtreCheck from https://etrecheck.com

Runtime: 3:57

Performance: Good

Problem: Computer is restarting

Description:

very slow wake up after hibernating; then spontaneous rebooting twice after around 10 minutes of inactivity

Major Issues:

Anything that appears on this list needs immediate attention.

Adware - Adware detected.

Minor Issues:

These issues do not need immediate attention but they may indicate future problems.

Clean up - There are orphan files that could be removed.

Unsigned files - There is unsigned software installed. They appear to be legitimate but should be reviewed.

32-bit Apps - This machine has 32-bits apps that may have problems in the future.

Hardware Information:

iMac (21.5-inch, Late 2012)

iMac Model: iMac13,1

1 2,7 GHz Intel Core i5 (i5-3330S) CPU: 4-core

8 GB RAM Upgradeable

BANK 0/DIMM0

4 GB DDR3 1600 ok

BANK 1/DIMM0

4 GB DDR3 1600 ok

Video Information:

NVIDIA GeForce GT 640M - VRAM: 512 MB

iMac 1920 x 1080

Drives:

disk0 - APPLE HDD HTS541010A9E662 1.00 TB (Mechanical)

Internal SATA 3 Gigabit Serial ATA

disk0s1 - EFI (MS-DOS FAT32) [EFI] 210 MB

disk0s2 - Macintosh HD (Journaled HFS+) 999.35 GB

disk0s3 - Recovery HD (HFS+) [Recovery] 650 MB

Mounted Volumes:

disk0s2 - Macintosh HD 999.35 GB (348.97 GB free)

Journaled HFS+

Mount point: /

disk1s2 - T**************************n 1.96 TB (1.42 GB free)

Case-sensitive Journaled HFS+

Mount point: /Volumes/T**************************n

Network:

Interface usbmodem1a1310: USB Modem

Interface usbmodem1a1311: Samsung Android USB Device

Interface usbmodem058a2c22: SAMSUNG_Android_GT-I8730

Interface en0: Ethernet

Interface en9: iPhone 4

Interface en8: iPhone 3

Interface en6: iPhone

Interface en7: iPhone 2

Interface en5: iPad

Interface en1: Wi-Fi

802.11 a/b/g/n

One IPv4 address

4 IPv6 addresses

Interface en4: Bluetooth PAN

Interface bridge0: Thunderbolt Bridge

iCloud Quota: 4.65 GB available

System Software:

macOS High Sierra 10.13.3 (17D102)

Time since boot: About 9 hours

System Load: 1.69 (1 min ago) 1.69 (5 min ago) 1.71 (15 min ago)

Security:

System	Status
Gatekeeper	Mac App Store and identified developers
System Integrity Protection	Enabled

Adware:

Launchd: ~/Library/LaunchAgents/com.mopt.hmopt.plist

Reason: Adware name match

Executable: ~/Library/Application Support/mopt/hmopt.app/Contents/MacOS/hmopt

Launchd: ~/Library/LaunchAgents/com.extensions.updater69337.agent.plist

Reason: Adware name match

Executable: ~/Library/LaunchAgents/UpdateDownloader cmpId=3357 ibic=DB9ABC6197A32F9CB26800004492360E verifier=35bb08e73acbd0a9f832b0edf1106566 extId=69337 updatejsondomain=http:/update.cloudmaxbox.com statsdomain=http:/stats.cloudmaxbox.com eventsdomain=http:/logs.cloudmaxbox.com errorsdomain=http:/errors.cloudmaxbox.com installerversion=01-27

Launchd: ~/Library/LaunchAgents/com.extensions.updater69337.ver

Reason: Adware name match

Executable:

Unsigned Files:

Launchd: /Library/LaunchAgents/com.oracle.java.Java-Updater.plist

Executable: /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Resources/Java Updater.app/Contents/MacOS/Java Updater -bgcheck