It happens both in beta 1 and beta 2.
After installing xcode 7 beta, I see no simulators at all.
When navigation to Xcode -> open developer tool -> Simluator
I get the following error "Simulator cannot be opened because of a problem.":
(reinstalling xcode beta didn't work. xcode 6.4 works fine)
Process: Simulator [1541]
Path: /Applications/Xcode-beta.app/Contents/Developer/Applications/Simulator.app/Contents/MacOS/Simulator
Identifier: com.apple.iphonesimulator
Version: ???
Build Info: Indigo-605000000000000~23
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Simulator [1541]
User ID: 502
Date/Time: 2015-07-01 12:16:11.842 +0300
OS Version: Mac OS X 10.10.4 (14E46)
Report Version: 11
Anonymous UUID: F963D212-569A-07E6-358A-853EBB0129B1
Time Awake Since Boot: 3400 seconds
Crashed Thread: 0
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Application Specific Information:
dyld: launch, loading dependent libraries
Dyld Error Message:
Library not loaded: /usr/lib/libwep
Referenced from: /Applications/Xcode-beta.app/Contents/Developer/Applications/Simulator.app/Contents/MacOS/Simulator
Reason: no suitable image found. Did find:
/usr/lib/libwep: mmap() error 1 at address=0x1061E7000, size=0x00003000 segment=__TEXT in Segment::map() mapping /usr/lib/libwep
/usr/lib/libwep: mmap() error 1 at address=0x1061EE000, size=0x00003000 segment=__TEXT in Segment::map() mapping /usr/lib/libwep
Binary Images:
0x7fff64cda000 - 0x7fff64d10837 dyld (353.2.1) <72A99D0F-0B56-3938-ABC5-67A0F33757C4> /usr/lib/dyld
0x7fff81ccc000 - 0x7fff81f8dffb com.apple.WebKit (10600 - 10600.7.12) <A6515140-ADED-30E6-B010-E5C3EEC51732> /System/Library/Frameworks/WebKit.framework/Versions/A/WebKit
0x7fff83c40000 - 0x7fff83c43fff com.apple.xpc.ServiceManagement (1.0 - 1) <D94F7F86-4015-3453-92FD-ADC04F215C04> /System/Library/Frameworks/ServiceManagement.framework/Versions/A/ServiceManagement
0x7fff8600c000 - 0x7fff8602cff7 com.apple.MultitouchSupport.framework (264.6 - 264.6) <B4BDB2C0-5D4E-30F4-8EB0-CC16C91DF418> /System/Library/PrivateFrameworks/MultitouchSupport.framework/Versions/A/MultitouchSupport
0x7fff885fc000 - 0x7fff88994ff7 com.apple.CoreFoundation (6.9 - 1153.18) <5C0892B8-9691-341F-9279-CA3A74D59AA0> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
0x7fff88c4f000 - 0x7fff88cc1fff com.apple.framework.IOKit (2.0.2 - 1050.20.2) <09C0518C-90DF-3FC3-96D6-34D35F72C8EF> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
0x7fff898bf000 - 0x7fff898bffff com.apple.Carbon (154 - 157) <9BF51672-1684-3FDE-A561-FC59A2864EF8> /System/Library/Frameworks/Carbon.framework/Versions/A/Carbon
0x7fff8ae73000 - 0x7fff8ae74ff3 libSystem.B.dylib (1213) <AD223AEB-237D-35A3-825E-EECF95916838> /usr/lib/libSystem.B.dylib
0x7fff8af1c000 - 0x7fff8b758fef com.apple.CoreGraphics (1.600.0 - 788.2) <31A7F05E-9C68-3642-A8F0-3863777955AE> /System/Library/Frameworks/CoreGraphics.framework/Versions/A/CoreGraphics
0x7fff8bf66000 - 0x7fff8c116ff3 com.apple.QuartzCore (1.10 - 361.19) <F815B60E-75E3-3263-BE93-27A49882CF58> /System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore
0x7fff8d075000 - 0x7fff8dbf6ff7 com.apple.AppKit (6.9 - 1348.17) <E485D56D-3E72-34B7-99BB-BFDEE2D07BF5> /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
0x7fff8dbf7000 - 0x7fff8df28fff com.apple.Foundation (6.9 - 1153.20) <F0FF3A5D-C5B7-34A1-9319-DE1EF928E58E> /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
0x7fff8f40d000 - 0x7fff8f60746f libobjc.A.dylib (647) <759E155D-BC42-3D4E-869B-6F57D477177C> /usr/lib/libobjc.A.dylib
0x7fff8f7b4000 - 0x7fff8f7c2ff7 com.apple.opengl (11.1.2 - 11.1.2) <5F355713-4637-33CD-9CBA-4B4CA43FB0FE> /System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL
Model: Macmini7,1, BootROM MM71.0220.B03, 2 processors, Intel Core i5, 2.6 GHz, 16 GB, SMC 2.24f32
Graphics: Intel Iris, Intel Iris, Built-In
Memory Module: BANK 0/DIMM0, 8 GB, DDR3, 1600 MHz, 0x02FE, 0x4544464232333241314D412D47442D460000
Memory Module: BANK 1/DIMM0, 8 GB, DDR3, 1600 MHz, 0x02FE, 0x4544464232333241314D412D47442D460000
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x13B), Broadcom BCM43xx 1.0 (7.15.166.24.3)
Bluetooth: Version 4.3.5f8 15969, 3 services, 27 devices, 1 incoming serial ports
Network Service: Ethernet, Ethernet, en0
Serial ATA Device: APPLE HDD HTS541010A9E662, 1 TB
USB Device: iPhone
USB Device: IR Receiver
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
USB Device: Plantronics C310-M
USB Device: Keyboard Hub
USB Device: Apple Keyboard
Thunderbolt Bus: Mac mini, Apple Inc., 26.1