thank you... here it is :
Hardware Information: (What does this mean?)
Mac mini (Late 2014)
[Click for Technical Specifications]
[Click for User Guide]
Mac mini - model: Macmini7,1
1 1.4 GHz Intel Core i5 CPU: 2-core
4 GB RAM Not upgradeable
BANK 0/DIMM0
2 GB DDR3 1600 MHz ok
BANK 1/DIMM0
2 GB DDR3 1600 MHz ok
Bluetooth: Good - Handoff/Airdrop2 supported
Wireless: en1: 802.11 a/b/g/n/ac
Video Information: (What does this mean?)
Intel HD Graphics 5000
S24E391 1920 x 1080
System Software: (What does this mean?)
OS X El Capitan 10.11.1 (15B42) - Time since boot: about 2 days
Disk Information: (What does this mean?)
APPLE HDD HTS545050A7E362 disk0 : (500.11 GB) (Rotational)
EFI (disk0s1) <not mounted> : 210 MB
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
Macintosh HD (disk1) / : 498.89 GB (470.66 GB free)
Core Storage: disk0s2 499.25 GB Online
USB Information: (What does this mean?)
Apple, Inc. IR Receiver
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. iPhone
Logitech USB Receiver
Thunderbolt Information: (What does this mean?)
Apple Inc. thunderbolt_bus
Gatekeeper: (What does this mean?)
Anywhere
User Login Items: (What does this mean?)
iTunesHelper Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
Other Apps: (What does this mean?)
[running] com.apple.xpc.launchd.oneshot.0x1000002f.EtreCheck
Internet Plug-ins: (What does this mean?)
Default Browser: Version: 601 - SDK 10.11
QuickTime Plugin: Version: 7.7.3
3rd Party Preference Panes: (What does this mean?)
None
Time Machine: (What does this mean?)
Time Machine information is not available
Top Processes by CPU: (What does this mean?)
4% WindowServer
2% kernel_task
1% fontd
0% corestoragehelperd
Top Processes by Memory: (What does this mean?)
479 MB kernel_task
246 MB com.apple.WebKit.WebContent(2)
213 MB iTunes
197 MB mdworker(14)
86 MB Safari
Virtual Memory Information: (What does this mean?)
68 MB Free RAM
3.93 GB Used RAM (819 MB Cached)
48 MB Swap Used
Diagnostics Information: (What does this mean?)
Nov 27, 2015, 10:43:54 PM Self test - passed
Nov 27, 2015, 10:19:54 PM ~/Library/Logs/DiagnosticReports/cloudd_2015-11-27-221954_[redacted].crash
Nov 27, 2015, 09:41:06 PM /Library/Logs/DiagnosticReports/com.apple.photos.ImageConversionService_2015-11 -27-214106_[redacted].cpu_resource.diag [Click for details]
Nov 27, 2015, 09:20:02 PM ~/Library/Logs/DiagnosticReports/mapspushd_2015-11-27-212002_[redacted].crash